“I’m far more equipped to deal with fame in my 30s” As Fifty Shades Darker’s kinky billionaire Christian Grey, Jamie Dornan has been spending his workdays in various states of undress, experimenting with some rather complicated bedroom accessories. When he’s at home, though, things get even more animated. Take, for example, the princess-filled hit Frozen:“I could act the whole bloody thing out for you right now and I could sing every bloody line of every song,” says the star, 34, the father of two daughters, Dulcie, 3, and Phoebe, 1, with his wife, actress Amelia Warner. He is also an expert on Trolls, Dulcie’s current favourite.“In the car, we just listen to Justin Timberlake and Anna Kendrick sing at us on every family journey we go on, which is kind…