Klick ins Herz(2009)

Maggie and Paul senior meet in a chat room. They are so taken with each other that they decide to take the plunge and meet up in real life. There's just one catch: both have made themselves younger - as young as Maggie's daughter Eva and Paul's son Paul junior. The two "children" agree to go on a date instead of their parents, which turns out to be quite a flop. It remains to be seen whether Maggie and Paul will dare to meet in person...