The single life of millionaire playboy Jimmy Martino is about to be end with "Grandfathered" premiering tomorrow, Sept. 29. The new FOX comedy series starring Jon Stamos follows Jimmy, who becomes a grandpa in split seconds after Gerald, a son he never knew existed, turns up at his office with his granddaughter.

The ladies' man starts to contemplate on whether or not he really wants a family when his son, whom he calls a "weird kid" in the preview, shows up with his baby Edie, breaking the news of his sudden transition into grandfatherhood.

Gerald is revealed to be Jimmy's son with his ex-girlfriend Sara, who never told him about the kid because she thinks Jimmy is too caught up in his career and his self-interests to even pay attention.

At the start of "Grandfathered," Jimmy will be reasonably confused and in denial of the fact that his days of being swarmed by doting women are over and that his thriving restaurant business will no longer be his top priority.

Nonetheless, it won't take long for Jimmy to realize this discovery could be the biggest blessing he has ever received and, in turn, strives to be a loving grandfather to Edie and a supportive father to Gerald.

In some scenes, fans saw Jimmy change the baby's diaper only to discover he was changing the wrong baby. His commitment to babysit Edie is shown when he chooses to stay with his granddaughter even as NFL legend Deion Sanders decides to dine at his restaurant.

He even takes a fevered Edie to the hospital and is prepared to give anything, even his liver, just to bring the adorable little one to safety.

"Grandfathered" will also see Jimmy giving Gerald some tips straight from his womanizer manual to help him get a date with Edie's mother Vanessa, who only sees Gerald as a friend even after they had a baby together.