Leonardo DiCaprio's girlfriend Camila Morrone just turned 25 years old

The Shutter Island actor, 47, started dating the Argentine-American model in 2017 - when she was 20.

Over the years, the internet have pointed out how Leonardo has the tendency to date people who are 25 or younger.

In an Instagram post shared this week, she wrote: "One quarter century down. Thank you to everyone sending me bday love. Smiles from sunny Minnesota."

While most of the commenters wished the model a happy birthday, many felt the need to joke about her reaching Leo's relationship 'age limit'.

The couple, who have a 23-year age gap, have been head over heels for each other since they began dating.

Camila discussed their age difference in an interview with Los Angeles Times in 2019.

She said: "There’s so many relationships in Hollywood — and in the history of the world — where people have large age gaps."

The stunning star continued: "I just think anyone should be able to date who they want to date."