Jen Garner Opens Up About Third Pregnancy, Baby Names and Thongs

Reporting by UsWeekly

Violet, Seraphina and ... Daisy Duck?

Expecting her third child with husband Ben Affleck, Jennifer Garner opens up for the first time about her pregnancy on Tuesday's "Ellen DeGeneres Show." "The first trimester is just yuck," the "Arthur" actress, 39, tells Ellen. "Kind of an all day sickness. But after that, [this pregnancy] is not a big thing except there is one big thing," Garner says, "And that is, my bottom ... You know how once you have kids you never ever pee by yourself again? At least one of them is always in there with you at all times."

PHOTOS: Adorable photos of Violet and Seraphina

Married for five years, Garner and Affleck, 39, have daughters Violet, 4, and Seraphina, 2; they confirmed they were expecting again in late August. "So the other day... [Violet] is in there with me and all of the sudden she went, 'Oh Mom, we have to have a talk,' ... She said, 'Mom, your bottom has gotten so big that your panties don't even begin to cover it.'"

The "Alias" actress cleared up the confusion with her eldest: "I said, 'It's called a thong, you wear it when you're a grown up. She was like, 'Uh, that is so gross!'"

PHOTOS: Jennifer's pre-pregnancy bikini bod

Meanwhile, Violet and her little sister Seraphina "have a lot of opinions" on their sibling-to-be, Garner says. "They don’t really care about the gender as much as long as we name it what they want it to be named."

Some of the cuties' suggestions? "Ralphie, Frankie, Minnie Mouse, Daisy Duck. Rosemarie. Daisy Duck Affleck.  I can see us going that way," Garner cracked, laughing.

For now, Affleck is content playing not baseball but "baby doll" with his little girls. "My husband plays a lot of baby doll. He is really cute," Garner gushes. "I will walk in and he will be sitting on a little chair. He's so tall! And he'll have a baby doll and I'll say, 'What are you doing?'  'I'm watching Frankie (the baby doll) here."

Click through to see what other expecting celebs are saying about their impending parenthood ...