Jessica Brown Findlay leads a riot of glamour at photocall for new film The Riot Club

The Downton Abbey star posed with her co-stars from the new film

Royal riot: The stars posed at the photocall of their upcoming film (Photo by David M. Benett/WireImage)

Lizzie Edmonds @lizzieedmo16 September 2014

Jessica Brown Findlay and Holliday Grainger both went for glamorous red lipstick at a photocall for their new film, The Riot Club.

Findlay, who played Lady Sybil in Downton Abbey, wore a cream mini-dress while Grainger, best known for her role in The Borgias, opted for a black and white peplum jumpsuit to last night's event at the BFI Southbank.

The leading ladies were joined by three of their co-stars — Sam Reid, Max Irons and Freddie Fox.

Based on Laura Wade’s 2010 play Posh, the upcoming film follows Hunger Games star Sam Claflin, who plays a young aristocrat, as he joins Oxford University’s infamous Bullingdon Club.

Claflin and co-star Douglas Booth were having a riot on Nick Grimshaw's BBC Radio One Breakfast Show this morning.

Radio riot: Sam and Douglas met Grimmy for some selfies

After posing for pictures with the chirpy presenter the actor tweeted: "What a way to wake up! Had an absolute blast this morning on @R1breakfast with @grimmers and@DouglasBooth. Now off for a 30 minute shower!"

The film is set for UK release on 19 September.