'Mom' star Jaime Pressly pregnant with twins

June 7 (UPI) -- Jaime Pressly is going to be a mom to twins.

The 39-year-old actress confirmed in an interview with People that she's expecting twin boys with boyfriend Hamzi Hijazi in the fall.

"Twins don't run on either side of our families so we were completely shocked," she confessed. "This wasn't IVF or anything like that. It was just a shock, and I'm like, 'Doctor, that's impossible!'"

Pressly is already mom to 10-year-old son Dezi James with ex-partner Eric Cubiche. She told the magazine she and Hijazi have been trying to have children for "quite a while."

"I've always wanted three kids and the older I'm getting, I'm like, 'Okay, maybe just one more would be nice.' I was getting a little sad, but it was like, 'We'll give you two in one,'" the star said of having twins.

"[Dezi is] beside himself," she added. "He's been begging Hamzi and I to give him a sibling since he was in kindergarten. He's very patient and sweet and gentle and is going to be the best little babysitter ever."

Pressly also shared her baby news with her Instagram followers.

"Big news for our family! Dezi's going to be a big brother, times 2!" she captioned a photo of herself holding up her positive pregnancy test.

Pressly is known for playing Joy Turner on My Name is Earl, and has since appeared on Raising Hope and Two and a Half Men. She presently portrays Jill Kendall on Mom, which will return for a fifth season Nov. 2 on CBS.