Jennifer Garner and Rose Byrne have Royal Baby Fever

Jennifer Garner is gaga for the Prince George. Aussie Bridesmaids star Rose Byrne is also crazy about the royal baby.

Just ask Byrne's boyfriend, Bobby Cannavale.

"My girlfriend's really into it and I'm working with Jen Garner right now in a movie so between the two of them I know everything I need to know," Cannavale said at Thursday's L.A. premiere of his new movie, the Woody Allen-directed Blue Jasmine. "I know what kind of dress she wore. I knew he wore black jeans and drove his own car."

But then Canavale said, "I don't really give a s--t. I don't care."