Sharon Osbourne is "very, very excited" to greet her future grandchild.

Sharon's son Jack announced last October that he is expecting his first child with fiance Lisa Stelly.

The entire family can't wait to meet the new addition to their brood.

"We're very, very excited!" Sharon gushed to Us Weekly. "We're waiting for the phone to ring to say 'Just get to [the hospital]' and we will be there."

Sharon believes that Jack will be an impressive father, although he is anxious about becoming a parent.

"He's very nervous -- but nervous-excited," Sharon said. "He'll be a very good dad. I think he'll be very strict, but he'll be a very good dad."

Jack's father Ozzy can't wait for his son to experience fatherhood.

"He just said, 'now Jack will realise the meaning of love, because you will never love anything the way you love your first child,' " Sharon shared.

Jack's partner Lisa was originally due to deliver on April 18 and is expected to deliver any day now.