Bradley Cooper [Photo/Agencies]

Bradley Cooper returning to Broadway

'The Midnight After' promoted at Berlinale Film Festival

The hunky star is nominated for Best Supporting Actor for his portrayal of Richie DiMaso in 'American Hustle' and he admits he has yet to decide who he'll invite to the glitzy awards bash next month.

He told Figaro TV: "I'm waiting to find out how many tickets I'm going to get."

Cooper - who took his mother as his date to the Oscars last year, when he was nominated for Best Leading Actor for 'Silver Linings Playbook' - has reunited with David O. Russell for his new movie and says it was his idea to give his character an unsightly perm hairdo.

He explained: "It was my idea. I watched loads of videos of someone who was from the FBI during this period. So I approached David O. Russell about having a curly hairdo and he said yes! Then lots of ideas came from that. He puts rollers in his hair every day to become someone else. So then I had to spend three hours every day in hair and make-up getting my hair curled."