EXCLUSIVE: Kaley Cuoco Gushes Over 'Perfect' Boyfriend Karl Cook at 'Why Him?' Premiere

The 'Big Bang Theory' star has no problem answering the question 'Why him?' when it comes to her handsome beau.

Kaley Cuoco stars in the new holiday comedy Why Him?, but she has no trouble answering that question when it comes to her boyfriend, Karl Cook.

ET’s Katie Krause caught up with the Big Bang Theory star on the Why Him? red carpet in Los Angeles on Saturday, where she was quick to gush over her handsome date for the night.

“He's so cute!” Cuoco told ET. “[Why him?] Because he's perfect!”


RELATED: Kaley Cuoco Celebrates Her 31st Birthday With Boyfriend Karl Cook: Pics!

The couple were even cutely coordinated for the date night, with Cuoco donning a white lace short-sleeved dress, while Cook looked spiffy in a dark grey checkered suit with a cream-colored shirt and no tie.

Why Him?
centers on the tumultuous relationship between a father (Bryan Cranston) and his daughter’s new boyfriend, an eccentric billionaire playboy (James Franco). In the movie, Cuoco stars as “Justine,” the voice of Franco’s character’s in-home artificial intelligence system.

WATCH: Kaley Cuoco Shares Sweet Snap With Boyfriend Karl Cook and Her Dog: 'I Can't Choose'

The actress, who met Cook at a horse show after splitting from husband Ryan Sweeting in September 2015, told the ladies of The Talk that Cook’s shared passion for all things equestrian was one of the things that drew her to him in the first place.

"I finally found my horse guy," she shared in September. "It was very meant to be. We shared a passion for horses and dogs… It's been lovely." 

Cuoco and Cook recently enjoyed a sweet date night at last week’s Critics’ Choice Awards, where they couldn’t keep their eyes off each other as they posed for pics on the red carpet. See more about the too-cute couple in the video below!

Why Him?
hits theaters on Dec. 23.

WATCH: Kaley Cuoco and Boyfriend Karl Cook Get Cozy at Critics’ Choice Awards: See Pics From Their Romantic Night