Despite their celebrity prominence, Anna Kendrick and Bill Hader's romance was kept under wraps.

"They're both very private individuals, so it was simple to keep it quiet," a source tells PEOPLE.

"They're both hysterical so they must always be laughing," the source said. "She's overjoyed."

According to People, the pair has been privately dating for over a year.

According to People, the Noelle co-stars have been dating for almost a year.

They did a movie together, but they got together after the filming.”

From 2006 through 2018, Hader was married to Maggie Carey. Hannah Kathryn, 12, Harper, 9, and Hayley Clementine, 7

Kendrick dated British cinematographer Ben Richardson before.

In 2015, they even generated engagement rumours.

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