Diane Kruger & Joshua Jackson - amfAR Cannes Gala 2012

Joshua Jackson and Diane Kruger hold hands at the 2012 amfAR Cinema Against AIDS Gala on Thursday (May 24) at Hotel du Cap-Eden-Roc in Antibes, France.

Inside the soiree, the 35-year-old actress (and 2012 Cannes Film Festival jury member) hit the stage with designer Karl Lagerfeld and producer Harvey Weinstein.

The day before, Joshua won a Carla Amorim necklace for Diane at the Nights in Monaco gala fundraiser – with a bid of $45,000!

Though Joshua was rumored to be overheard saying it was an engagement present, sources told People the two are not engaged.

FYI: Diane is wearing a Chanel dress.