The actress sat front row in a stunning disco queen-inspired chainmail dress and voluminous curls.
The couple reportedly welcomed their first child together in recent weeks.
Speculation about Kruger's pregnancy began back in May.
Jackson was photographed strolling through New York's Central Park with the Cheddar TV host over the weekend.
The 'Inglourious Basterds' star spoke out to support victims of abuse, while defending her director in the Oscar-winning film.
The stars stepped out in a plethora of white ensembles for Thursday's ceremony.
The pair posed for photos together at the Critics' Choice Awards at Barker Hangar on Jan. 11 in Santa Monica, California.
ET talked to the couple ahead of the 2018 Critics' Choice Awards, where her film 'In the Fade' is nominated for Foreign Language Film.
From Nina Dobrev and Julianne Hough to Diane Kruger and Emily Ratajkowski, see all of the amazing dresses at the InStyle and Warner Bros. soiree on Sunday night.
The couple made their red carpet debut on Sunday night.
The couple enjoys a fun-filled day while vacationing in paradise.
Even big name beauties make red carpet mistakes!
A look back at some of the most unforgettable ensembles from the awards show.
The actress won the Best Actress award at Cannes for the crime drama and Germany will submit the film, out Dec. 27, as their Academy Awards contender.
