Johansson makes first appearance with beau as coupleNew York, Dec 1 (AZINS) Actress Scarlett Johansson and her boyfriend Colin Jost made their first public appearance as a couple while attending the American Museum of Natural History Gala here.

The pair graced the red carpet separately, but they posed for photographs together at the event on Thursday, reports aceshowbiz.com.

Johansson was seen wearing a strapless red vintage satin gown. Meanwhile, her boyfriend donned a black tuxedo.

"They're very much in love. It's serious. They're both very respectful of each other's careers and very supportive. They're super cute together," a source said.

"She would go dates with Colin and be very excited after. It took a while for them to be exclusive, but they are now. Scarlett is very happy with Colin," the source added.