The source said;
“They are both very private people, and with the pandemic it was easy to keep it quiet.
“They’re both hysterical so they must keep each other laughing all of the time. She’s really, really happy.”
The news comes a year and a half after it was revealed that Bill Hader and Rachel Bilson had ended their relationship in July 2020. They broke up just seven months after making their red carpet debut as a couple at the Golden Globes in January 2020.
Hader was formerly married to Maggie Carey, a film director, from 2006 till 2018. Hannah Kathryn, 12, Harper, 9, and Hayley Clementine, 7, are still co-parents.
Kendrick previously dated British cinematographer Ben Richardson, who is well-known for keeping her personal life private. In 2013, the former couple met on the set of "Drinking Buddies" and started dating in 2014.
Kendrick and Richardson even generated engagement rumours at one point in 2015. According to the Daily Mail, the two ended their relationship at an unknown point. They were last seen holding hands in 2019.