Mischa Barton might not have gotten very far on this season of Dancing With the Stars, but The O.C. alum got more out of the show than expected.
A source confirms to ET that Barton and her DWTS partner, Artem Chigvintsev, have started dating. The pair were spotted out at The Little Door, a quaint French restaurant in Los Angeles, on Wednesday night.
"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."
See photos of the pair:
Mischa Barton and Artem Chigvintsev
EXCLUSIVE: Mischa Barton goes on first date with 'DWTS' partner Artem Chigvintsev
DANCING WITH THE STARS - 'Episode 2203 - The remaining celebrities will set out to leave a lasting impression with their dances as they commemorate their most memorable year, on 'Dancing with the Stars,' live, MONDAY, APRIL 4 (8:00-10:01 p.m. EDT) on the ABC Television Network. (Photo by Adam Taylor/ABC via via Getty Images)
ARTEM CHIGVINTSEV, MISCHA BARTON
LOS ANGELES, CALIFORNIA - APRIL 01: Artem Chigvintsev and Mischa Barton attend the boohoo.com Flagship LA Pop Up Store with opening party fueled by CIROC Ultra-Premium Vodka on April 1, 2016 in Los Angeles, California. (Photo by Araya Diaz/Getty Images for Paul Wilmot )
DANCING WITH THE STARS - Rehearsals - The celebrity cast of 'Dancing with the Stars' is lacing up their ballroom shoes and getting ready for their first dance on MONDAY, MARCH 21 (8:00-10:01 p.m., ET) on the ABC Television Network. (Photo by Aaron Poole/ABC via Getty Images)
MISCHA BARTON, ARTEM CHIGVINTSEV
DANCING WITH THE STARS - 'Episode 2201' - 'Dancing with the Stars' is back with an all-new celebrity cast ready to hit the ballroom floor. The competition begins with the two-hour season premiere, live, MONDAY, MARCH 21 (8:00-10:01 p.m. EDT) on the ABC Television Network. The premiere episode kicks off with an exciting and dynamic opening number, featuring all of the celebrities and dancers, along with returning head judge Len Goodman. The night continues with each couple dancing a cha cha, fox trot, jive, tango or quickstep, vying for America's vote for the first time. (Photo by Adam Taylor/ABC via via Getty Images)
ARTEM CHIGVINTSEV, MISCHA BARTON
GOOD MORNING AMERICA - The cast of the 22nd season of 'Dancing with the Stars' is revealed live on 'Good Morning America,' 3/8/16, airing on the ABC Television Network. 'Dancing With the Stars' Season 22 premieres Monday, March 21 (8:00-10:00 p.m. EST) on the ABC Television Network.'n(Photo by Heidi Gutman/ABC via Getty Images) 'nMISCHA BARTON, ARTEM CHIGVINTSEV
DANCING WITH THE STARS - MISCHA BARTON AND ARTEM CHIGVINTSEV - The stars grace the ballroom floor for the first time on live national television with their professional partners during the two-hour season premiere of 'Dancing with the Stars,' which airs MONDAY, MARCH 21 (8:00-10:01 p.m., ET) on the ABC Television Network. (Photo by Craig Sjodin/ABC via Getty Images)
GOOD MORNING AMERICA - The cast of the 22nd season of 'Dancing with the Stars' is revealed live on 'Good Morning America,' 3/8/16, airing on the ABC Television Network. 'Dancing With the Stars' Season 22 premieres Monday, March 21 (8:00-10:00 p.m. EST) on the ABC Television Network.'n(Photo by Heidi Gutman/ABC via Getty Images) 'nMICHAEL STRAHAN, LARA SPENCER, MISCHA BARTON, ARTEM CHIGVINTSEV, AMY ROBACH, GEORGE STEPHANOPOULOS
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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.
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 DWTS in early April.
"It was definitely, maybe more than I had bargained for in a lot of ways," Barton told ET at the time. "But I'm so happy I tried something that's that foreign to me, and you know, had this experience with these guys."