Catherine Zeta-Jones is looking to reinvent her career as she packs her calendar with gigs, and insiders say that leaves hubby Michael Douglas puttering around the home alone.

Sources say the 81-year-old acting legend, who is mostly retired now, is panicking as his 25-years-younger wife is building a brand-new life that has no place for him in it.

“She’s got a lot on her plate right now and has no intention of giving up on her career or slowing down, far from it,” says an insider. “This could turn into a divorce nightmare.”

“Catherine’s got at least two new projects coming up. She’s excited to be out schmoozing with people again. She’s in a powerful position in Hollywood and bringing in the paychecks. The elephant in the room, of course, is Michael.”

In the past, the Wall Street star, who’s been married to Catherine since 2000, has revealed how proud he is of his wife’s achievements.

“I admire Catherine so much and in so many ways — as a mother, as an actress, and now as a businesswoman,” he boasted to Entertainment Tonight, referring to Casa Zeta-Jones, her home decor and clothing line on QVC.

But the insider notes that Michael “isn’t really involved in what she’s doing and it’s difficult for him because he’s effectively sitting at home living the life of an old man.”

“He wouldn’t expect her to drop everything and sit by his side, but it pains him that she’s coming home excited and giddy over her career while he’s relegated to the easy chair.”

“When he decided to scale back on work, he thought there would be more date nights with Catherine and a chance to reconnect, but they are ships passing in the night.”

As Globe reported, sources say Catherine’s been craving space from Michael, who she feels is too clingy and needy since he confirmed his retirement.

“He doesn’t blame Catherine or resent her and wants her to be happy,” adds the insider. “But the fact is the kids have grown and moved out and he’s alone in the house more or less and bored out of his mind.”