A source close to the couple tells ET that their connection is "still new" and the attraction between the 22-year-old UFC fighter and the 21-year-old professional dancer has been building all season."They just got to know one another during the show and rehearsal [and] they took a liking to one another," the source dishes exclusively to ET.

The pair were spotted out at The Little Door, a quaint French restaurant in Los Angeles, on Wednesday night.

WATCH: Mischa Barton Eliminated From ‘DWTS’ After Earning Her Highest Score Yet “They've been in touch after the show and care about each other but this is the first proper date,” a source told ET, adding that the pair are “transitioning into more than friends.” “He is the reason she's looking happier recently.

She has become giddy when talking about him and quite smitten with him.” The source added, “He's pursued her for a while, and she's coming around,” calling their outing “an official date.” After the two shared a meal, they went to Chateau Marmont where the actress introduced the dancer to some of her pals.

Erin Andrews is on thin ice with Peta Murgatroyd and Maksim Chmerkovskiy after spilling the beans on the couple's baby news -- their SECRET baby news.

Erin's loose lips struck during Monday's rehearsals for the "Dancing with the Stars" finale.

Our production sources say Erin was mic'd up when she walked up to Peta and Maksim and congratulated them ... We're told the couple was pissed since they hadn't told some of their closest friends and family yet -- and they were still planning a big announcement.

Erin apologized, but we're told she kept trying to blow it off as a joke ... Ironically, the next night, Peta did some blabbing of her own. At least Erin can make up for her mistake with an expensive baby gift.

MORE: Olivia Wilde Calls Mischa Barton Her Best On-Screen Kiss Barton, 30, hasn’t referenced the romance on her social media accounts yet, but on Wednesday she posted several solo shots of herself to Instagram, writing, “Sending you all love, light and laughter on this Wednesday night” and “Good Night,” with a heart emoji.

Barton was the second contestant to be eliminated from in early April.

"It was definitely, maybe more than I had bargained for in a lot of ways," Barton told ET at the time.

ballroom this season between contestant Paige Van Zant and troupe member Alan Bersten -- and we've got all the details!