"She deserves it all," said Nicholas, according to Press Association. "It's fun to watch."
Just last weekend Oscar-winner Jennifer scooped the Best Supporting Actress award at the Golden Globes for her role in comedy drama American Hustle. The 23-year-old beauty from Kentucky was again nominated for the same category for this year's Oscars awards and the SAG awards.
While Jennifer lost out to newcomer Lupita Nyong'o at Saturday night's SAG awards in Los Angeles, the popular star looked to be having a whale of a time at the ceremony, pulling funny faces at the camera backstage.
Nicholas, meanwhile, has been having his own fun at the Sundance Film Festival in Utah, where the British actor has been promoting his film Young Ones.
Nicholas' next project will be filming for the upcoming fantasy love story Equals, where he will star opposite Kristen Stewart. The Jack the Giant Slayer actor consulted Jennifer and the couple read the script before Nicholas decided to take on the role.
"We both loved the script," said Nicholas. "It's epic in proportion, but centred on these specific relationships."
Jennifer and Nicholas met in 2011 on the set of X-Men: First Class. The pair split up in January 2013, but had rekindled their romance by July after working together on the sequel X-Men: Days of Future Past.
The private couple surprised many when they shared a tender kiss in front of the cameras at last week's Golden Globes awards, after her film American Hustle had been crowned winner of Best Movie.