Stephanie Pratt has revealed Jonah Hill was a massive "clown" at high school.

Stephanie Pratt at War Dogs screening in London

Stephanie Pratt at War Dogs screening in London

The former 'Hills' star and the 32-year-old actor - who has starred in several acclaimed comedy films, including 'Knocked Up', 'Superbad' and '21 Jump Street' - were both students at Crossroads High School in Santa Monica, California, at the same time and Stephanie can recall him being a very funny guy even back then.

Speaking to BANG Showbiz at a gala screening of Jonah's latest movie 'War Dogs' in London on Thursday night (11.08.16), the 30-year-old blonde said: "We went to the same private school, yeah ... He was just a joker, a clown. Super self-deprecating and he was friends with everyone."

The pair are not the only Crossroads High School alumni to go on to become famous.

Other star students include Stephanie's brother Spencer Pratt, Kate Hudson, Liv Tyler, Zooey Deschanel, Michael Bay and Gwyneth Paltrow.

Stephanie currently stars on UK reality TV show 'Made In Chelsea' along with her boyfriend Josh Shepherd.

She made her first appearance on British television on the 2014 summer series of 'Celebrity Big Brother' and she admits she's obsessed with the current series which has seen the house at war due to the antics of housemates Stephen Bear, Chloe Khan, Lewis Bloor and Marnie Simpson.

She said: "Oh my god, I am totally obsessed with 'Big Brother'!"

Stephanie was joined at the screening by Jonah, 'War Dogs' director Todd Phillips and other celebrity guests such as her 'Made In Chelsea' co-stars Lucy Watson and her younger sister Tiffany Watson, Michelle Heaton, Dynamo and Kimberly Wyatt.