However, Keibler -- who participated on the second season of Dancing with the Stars and will host Lifetime's upcoming Supermarket Superstarsreality series, which premieres on Monday, July 22 -- and Clooney are reportedly trying to keep things friendly and civil between them.
"They talk every day. They were friends before they started dating and they'll be friends after. It was a friendly [breakup]," the source explained.
In addition to wanting different things down the road, Keibler, a 33-year-old actress and model, and Clooney, a 52-year-old actor, apparently struggled with their hectic work schedules.
"They haven't seen each other in a while and they've both been working so much, so in recent months, they've started growing apart," another source told People, adding that Keibler looks forward to traveling.
The couple was reportedly last spotted together in March in Berlin and recently spent the July 4 holiday apart.
Lifetime announced it had orderedSupermarket Superstars in August and that it will feature aspiring food product inventors pitching their original ideas to a panel of industry experts in the hopes of launching their creation nationally in a major grocery store chain.
(Photo credit Lifetime)
DISCUSS AND COMMENT ON THIS STORY Reality TV World now offers Facebook Comments on our stories. To post a comment, log into Facebook and then 'Add' your comment. To report spam or abuse, click the 'X' in the upper right corner of the comment box. Get more Reality TV World! Follow us on Twitter, like us on Facebook or add our RSS feed.