However, he lowered the mask several times to chat to the group as they strolled down the street.

The Oscar winner opted for a laidback look for the outing, donning a plain white T-shirt and grey jeans.

Low-key: Leonardo DiCaprio looked typically understated as he stepped out in London with his girlfriend Vittoria Ceretti and her family on Thursday

Out and about: The Hollywood actor, 49, was seen sightseeing with his Italian supermodel girlfriend, 25, (pictured) and a group of family and friends

Under the radar: Leo kept a low-profile as he hid his face underneath a black baseball cap and also sported a light blue face mask

Leo added a dark blue bomber jacket over the top and completed his outfit with a pair of black trainers.

Vittoria, who is 23 years his junior, looked effortlessly stylish in a pair of oversized light blue jeans.

She made sure to wrap up warm from the winter weather in a long black coat and a grey woollen scarf.

The model toted her essentials in a stylish beige Gucci handbag and donned black Converse trainers.

She was seen chatting away intently on the phone, while she hid her eyes behind a pair of fashionable black sunglasses.

Vittoria, who has been a runway model for the likes of Fendi and Versace, looked relaxed as they traipsed around London.

It comes after Leo celebrated his 49th birthday earlier this month and with Vittoria joining him and other A-list guests at the star-studded bash.

The pair packed on the PDA and were ‘affectionate and kissing throughout the night,’ according to People.

Spotted: However, he lowered the mask several times to chat to the group as they strolled down the street

Casual: The Oscar winner opted for a laidback look for the outing, donning a plain white T-shirt and grey jeans

Understated: Leo added a dark blue bomber jacket over the top and completed his outfit with a pair of black trainers

Looking good: Vittoria, who is 23 years his junior, looked effortlessly stylish in a pair of oversized light blue jeans

Cosy: She made sure to wrap up warm from the winter weather in a long black coat and a grey woollen scarf

Stylish: The model toted her essentials in a stylish beige Gucci handbag and donned black Converse trainers

Stunning: She was seen chatting away intently on the phone, while she hid her eyes behind a pair of fashionable black sunglasses

Outing: Vittoria, who has been a runway model for the likes of Fendi and Versace, looked relaxed as they traipsed around London

Birthday boy: It comes after Leo celebrated his 49th birthday earlier this month and with Vittoria joining him and other A-list guests at the star-studded bash

Leo was the life and soul of the party as he performed a rap and danced in front of a star-studded crowd, who gathered at a private residence in the exclusive neighbourhood.

He was seen being hoisted on a chair at the gathering, and later rapping into a microphone to the 1994 song DWYCK from Gang Starr and Nice & Smooth.

Leo – who has a reputation for only dating women aged 25 or under – his model girlfriend, and their celebrity pals reportedly kept the party going past 4.00am.

Other stars at the bash included Beyonce and husband Jay-Z, Kim Kardashian, Kate Beckinsale, Rita Ora, Zoe Saldana, and Snoop Dogg.

Earlier this month it was reported that Leo is ‘crazy’ about Vittoria, who turns 26 in June, with insiders claiming he is now dating her exclusively as she has ‘all of the qualities he looks for in a partner’.

Vittoria has become a sought-after face for adverts and has fronted campaigns for the likes of Chanel, Prada, Dolce & Gabbana and Moschino, among many others.

She has also walked the runway with big names including Kendall Jenner, Claudia Schiffer, Iris Law and Imaan Hammam.

Leo is due to turn 50 next year and he recently revealed the one goal he wants to accomplish before his milestone birthday.

Loved-up: The pair packed on the PDA and were ‘affectionate and kissing throughout the night,’ according to People

Party animal: Leo was the life and soul of the party as he performed a rap and danced in front of a star-studded crowd, who gathered at a private residence in the exclusive neighbourhood

Had a blast: He was seen being hoisted on a chair at the gathering, and later rapping into a microphone to the 1994 song DWYCK from Gang Starr and Nice & Smooth

Late night: Leo, his model girlfriend, and their celebrity pals reportedly kept the party going past 4.00am

Star-studded: Other stars at the bash included Beyonce and husband Jay-Z, Kim Kardashian , Kate Beckinsale , Rita Ora , Zoe Saldana , and Snoop Dogg

Age restriction: Leo has a reputation for only dating women aged 25 or under, with Vittoria turning 26 in June

Smitten: Earlier this month it was reported that Leo is ‘crazy’ about Vittoria with insiders claiming he is now dating her exclusively

Perfect match: Sources say that Vittoria has ‘all of the qualities he looks for in a partner’

Successful: Vittoria has become a sought-after face for adverts and has fronted campaigns for the likes of Chanel, Prada, Dolce & Gabbana and Moschino, among many others

Impressive: She has also walked the runway with big names including Kendall Jenner , Claudia Schiffer, Iris Law and Imaan Hammam

Aspiration: Leo is due to turn 50 next year and he recently revealed the one goal he wants to accomplish before his milestone birthday

Goal: In an interview with Good Morning America , The Titanic star shared his surprising answer, after Chris Connelly asked him what he wants to do before turning 50

In an interview with Good Morning America, The Titanic star shared his surprising answer, after Chris Connelly asked him what he wants to do before turning 50.

‘You know what? Just one more movie,’ he shared, before emphasizing again, ‘One more movie.’

Leo most recently starred in Killers of the Flower Moon, in another collaboration with iconic filmmaker Martin Scorsese.

The film follows the real life story of Ernest Burkhart (Leonardo) who becomes responsible for the murders of a number of his Native American wife’s relatives as part of a plot to inherit their lucrative oil rights in Oklahoma in the 1920s.

Leo and Martin have previously worked on 2002’s Gangs of New York, 2004’s The Aviator, 2006’s The Departed, 2010’s Shutter Island, 2013’s The Wolf of Wall Street.

Leo also has three other projects currently in pre-production, two of which will also be helmed by Martin.

The first one is ‘The Wager’, based on the novel The Wager: A Tale of Shipwreck, Mutiny and Murder by David Grann, the same author who wrote the book that Killers Of The Flower Moon is based on.

Another one is titled ‘Roosevelt’ and is a biopic of President Theodore Roosevelt.

Leo will also play mass-suicide cult leader Jim Jones in a film based on author Jeff Guinn’s book ‘The Road to Jonestown: Jim Jones and Peoples Temple.’

Dedicated: ‘You know what? Just one more movie,’ he shared, before emphasizing again, ‘One more movie’

Blockbuster: Leo most recently starred in Killers of the Flower Moon, in another collaboration with iconic filmmaker Martin Scorsese

Dark topic: The film follows the real life story of Ernest Burkhart (Leonardo) who becomes responsible for the murders of a number of his Native American wife’s relatives as part of a plot to inherit their lucrative oil rights in Oklahoma in the 1920s

Long-standing collaborators: Leo and Martin have previously worked on 2002’s Gangs of New York, 2004’s The Aviator, 2006’s The Departed, 2010’s Shutter Island, 2013’s The Wolf of Wall Street

In the pipeline: Leo also has three other projects currently in pre-production, two of which will also be helmed by Martin

Intriguing: The first one is ‘The Wager’, based on the novel The Wager: A Tale of Shipwreck, Mutiny and Murder by David Grann

Connection: David Grann is the same author who wrote the book that Killers Of The Flower Moon is based on

Interesting: Another one is titled ‘Roosevelt’ and is a biopic of President Theodore Roosevelt

Heavy subject matter: Leo will also play mass-suicide cult leader Jim Jones in a film based on author Jeff Guinn’s book ‘The Road to Jonestown: Jim Jones and Peoples Temple’

Waiting: The group of pals all gathered around by a car at one point as they waited patiently

Wreath: They were then seen heading into a house that was adorned with a Christmas wreath on the door

Kind gesture: At one point Leo helped one of his friends with his jacket

High-end: The group walked past the five star hotel The Ritz, which has become one of the world’s most famous luxury hotels

Ostentatious: The hotel has become synonymous with grandeur, prestige and high society and is a favourite with the rich and famous

Purchase: Leo was seen leaving one store with a book in his hand from Ryan Barrett

Turning heads: Despite attempting to keep under the radar with his outfit, Leo stood out as he gesticulated wildly

Group outing: The pals looked relaxed as they made their way around central London together

Stroll: Vittoria played with her long brunette tresses as she followed her boyfriend

Following the leader: Leo appeared to be giving out directions as he led the group on their walk