Bill HaderandRachel Bilsonare going strong.A source tells PEOPLE that theBarrystar andThe O.C.alumna are getting more serious as a couple.“They spend a lot of time together and it seems like a serious relationship,” the source says. “They were in L.A. over the Valentine’s Day weekend. On Sunday, they enjoyed a getaway to the Montage Hotel in Laguna Beach.”“It seems like a fun relationship,” the source says, adding that Bilson, 38, “always seems entertained,” around Hader, 41.“She won’t stop laughing when she’s with Bill,” the source continues. “He is very sweet and considerate to her. Quick to open doors and acts very attentive.”Todd Williamson/NBC/GettyHader and Bilsonpublicly confirmed their relationshipwhen they attended theGolden Globe Awardstogether on Jan. 4, holding hands as they made their way down the red carpet.The couple firstsparked romance rumorswhen they were spotted grabbing coffee together in his hometown of Tulsa, Oklahoma in December.According to TMZ, theSaturday Night Livealum held Bilson’s hand during the outing, which his family members also reportedly took part in.Rachel Bilson and Bill Hader.Jordan Strauss/Invision/AP/Shutterstock; Charles Sykes/Bravo/NBCU Photo Bank/NBCUniversal via Getty ImagesThe pair previously starred together in the 2013 romantic comedyThe To Do List. Maggie Carey, the film’s director, was married to Hader from 2006-2018. They share three daughters:Hayley Clementine, 5,Harper, 7, andHannah Kathryn, 10.Bilson, meanwhile,split fromactorHayden Christensenin 2017 after nearly a decade together. The exes share 5-year-old daughterBriar Rose.

Bill HaderandRachel Bilsonare going strong.

A source tells PEOPLE that theBarrystar andThe O.C.alumna are getting more serious as a couple.

“They spend a lot of time together and it seems like a serious relationship,” the source says. “They were in L.A. over the Valentine’s Day weekend. On Sunday, they enjoyed a getaway to the Montage Hotel in Laguna Beach.”

“It seems like a fun relationship,” the source says, adding that Bilson, 38, “always seems entertained,” around Hader, 41.

“She won’t stop laughing when she’s with Bill,” the source continues. “He is very sweet and considerate to her. Quick to open doors and acts very attentive.”

Todd Williamson/NBC/Getty

NBC’s “77th Annual Golden Globe Awards

Hader and Bilsonpublicly confirmed their relationshipwhen they attended theGolden Globe Awardstogether on Jan. 4, holding hands as they made their way down the red carpet.

The couple firstsparked romance rumorswhen they were spotted grabbing coffee together in his hometown of Tulsa, Oklahoma in December.

According to TMZ, theSaturday Night Livealum held Bilson’s hand during the outing, which his family members also reportedly took part in.

Rachel Bilson and Bill Hader.Jordan Strauss/Invision/AP/Shutterstock; Charles Sykes/Bravo/NBCU Photo Bank/NBCUniversal via Getty Images

Rachel Bilson and Bill Hader

The pair previously starred together in the 2013 romantic comedyThe To Do List. Maggie Carey, the film’s director, was married to Hader from 2006-2018. They share three daughters:Hayley Clementine, 5,Harper, 7, andHannah Kathryn, 10.

Bilson, meanwhile,split fromactorHayden Christensenin 2017 after nearly a decade together. The exes share 5-year-old daughterBriar Rose.

source: people.com