Article continues below advertisementKaia Gerber and Lewis Pullman put on quite the show at the Venice Film Festival, showcasing their sizzling chemistry in a series of affectionate displays.The 23-year-old model and 32-year-old actor shared a passionate kiss on the red carpet during the premiere of Pullman's film, The Testament of Ann Lee, on Monday, September 1. Article continues below advertisementSource: MegaKaia Gerber came to support Lewis Pullman's film, 'The Testament of Ann Lee.