08/23/2014 AT 08:00 PM EDT
is head over heels.
In fact, his new love – a fresh-faced, raven-haired beauty who's totally into him too – moved into his Beverly Hills home five months ago.
So what if Seacrest's new roomie is a 40-lb. black Lab named Georgia?
"It's a big deal," says Seacrest, relaxed and upbeat as he settles into a couch on his cliff-side patio overlooking a pool and the sprawl of Los Angeles below.
"I've never done this before!"
The 39-year-old American Idol
host says committing to a puppy "is me saying to myself, 'You should have a little responsibility' ... I'm turning 40 and it's a turning point number. You go, 'Wait, you've got to grow up a little bit.'"
Not that Seacrest's been slacking till now.
As one of the busiest stars in show business, the Emmy winner has built a $400 million multimedia empire, that includes Idol
, a syndicated daily radio show, the weekly American Top 40
countdown, a production company, charitable foundation, and now, a men's clothing line for Macy's.
The only missing piece in his action-packed life is a family to share it with.