Jamie Bell and Kate Mara – 6 years

Jamie Bell and Kate Mara form one of Hollywood’s youngest star couples. Bell is known for his work in Billy Elliot and Rocketman, while Mara became famous with her appearance in the House of Cards TV series.

What’s sweet is that they co-starred in Fantastic Four, and that’s where they actually met. In 2015, the same year the film was released, they started dating. Two years later, Mara was presented with an engagement ring, and the rest is history. They tied the knot in 2017, and in 2019, they welcomed their first child.