Jenna Dewan Reveals Her Older Kids Are ‘Obsessed’ with Baby Sister Rhiannon: ‘They Are Amazing’ (Exclusive) .Linh

Jenna Dewan says becoming a mom of three has exceeded her expectations.

While chatting at the InStyle Imagemaker Awards on Thursday, Oct. 24, the actress, 43, shared that her daughter Everly “Evy,” 11, and son Callum, 4, are the best older siblings to her baby daughter Rhiannon, whom she welcomed in June with fiancé Steve Kazee.

“They are great with her,” Dewan tells at the Los Angeles event. “They love her. They’re very into her, very loving.”

“Callum especially is really loving,” and, “Evy is obsessed with her and wants to hold her all the time and rock her and everything,” she adds.

Dewan admits that as she transitioned to a mom of three, “it really shocked me how easy it flowed.”

“I’m definitely outnumbered and my brain with scheduling three kids is a lot,” she says, “but they are incredible. They flow easily.”

Dewan shares Evy with her ex-husband Channing Tatum, and shares Callum and Rhiannon with Kazee.

In September, The Rookie star spoke to PEOPLE about how she balances her life as an actress with three children, sharing that it’s actually been easier than she expected.

“I think I had the idea it was going to be so hard,” Dewan told PEOPLE of going from two kids to three. “I’m thinking, ‘How in the world do you do three kids?'”

“And when Rhiannon was born and we came home from the hospital,” she continued, “I was like, ‘Here we go. This is going to be…How do we do a toddler, an 11-year-old and a baby?’ And it just really was smooth. It was pretty smooth.”