Of all the places to carry out a romantic surprise proposal, a crowded film festival Q&A wouldn't really be top of our list.

But if that film screening is your one and only chance to propose in front of big-name actors like Ryan Gosling, Eva Mendes and Saoirse Ronan… then we guess we'll let it slide. Just this once.

One movie fan took the opportunity to use the final question slot at a recent Q&A event with the Lost River cast at SXSW festival to propose to her girlfriend of 11 years. While the cast seemed pretty delighted, the girlfriend herself seemed pretty shocked!

Watch from around 11:40….