Leonardo DiCaprio and Vittoria Ceretti "are in love"

A source told Us Weekly: "They are in love. Leo was clearly very proud to be showing Vittoria off and letting everyone see how happy they are together."

Leonardo celebrated his birthday at a star-studded bash in Beverly Hills.

The Hollywood star and his girlfriend were joined at the party by the likes of Kim Kardashian, Jay-Z, Beyonce, Taika Waititi, and Rita Ora.

Leonardo has dated a host of well-known women over the years, including Gisele Bundchen, Bar Refaeli and Camila Morrone - but an insider recently revealed that he's now "exclusive" with Vittoria.

The source told Us Weekly: "It's going so well that Leo's actually being exclusive. Vittoria is all he thinks about."

The loved-up duo are also said to have a lot in common.

The insider added: "She's not intimidated by his fame at all - she even makes fun of it, 'the model and the movie star'. Leo finds it refreshing."

Meanwhile, another source recently revealed that Leonardo "adores" his girlfriend.

The insider told the Daily Mail newspaper: "Vittoria is a beautiful girl, but Leonardo is of course surrounded by many beautiful girls most of the time.

"But he adores her and she him, they have been spending a lot of time together this summer, travelling around on romantic trips.

"It has obviously led to much chatter within his circle that Leo is ready to hang up his lothario ways.

"There have been many women pictured with him, partying with him, but what he has with Vittoria is much more serious."