Johnny Galecki and his new girlfriend, Alaina Meyer, made their red carpet debut as a couple.

The 43-year-old actor and Meyer, a 21-year-old model, attended the 2018 People's Choice Awards ceremony Sunday in Santa Monica, Calif.

"The Big Bang Theory" star wore a blue suit with a collared shirt, while Meyer sported a black minidress with an embroidered patch.

Galecki kept an arm around Meyer as they posed for photos.

"Peeps choice was so fun with my bae," Meyer said in an Instagram post Sunday evening.

Galecki shared a photo with Meyer and his former "Roseanne" co-star Sara Gilbert from the event.

"Two of the very favorite women in my life. You keep my heart swelling and healthy, @alainamariemeyer and @thesaragilbert," he wrote.

"The Big Bang Theory" was nominated for three awards, The Show of 2018, The Comedy Show of 2018 and The Comedy TV Star of 2018 for Galecki's co-star Jim Parsons.

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Parsons won in his category.

Galecki and Meyer went public with their romance in September. Galecki attended Meyer's sister's wedding the next month.

"What a wonderful wedding @meri_meri @ericdehner with such amazing humans. My sister is married and it was so beautiful. Our family just doubled in size and I couldn't be happier #itsdehnertime," Meyer captioned a photo on Instagram.

Galecki plays Leonard Hofstadter on "The Big Bang Theory," which is in the midst of its 12th and final season on CBS.

He previously dated his co-star Kaley Cuoco.

Photo credit: Alaina Meyer/Instagram