updated 09/28/2012 AT 8:00 AM ET
•originally published 09/28/2012 AT 12:00 PM ET
“Not much is going to change. He’s a great dude, and he’s very focused on what he does and everything else, and I’m sure this will bring out the best,” Fatone, 35, told PEOPLE Thursday as he brought daughters Briahna and Kloey to see Batman Live in Los Angeles.
Timberlake and Biel know each other so well, Fatone adds, that they’re destined to stay together.