Ashlee Simpson 'So Ready' To Have Her Baby

Joe Simpson says his while daughter Ashlee may only be 24, finding out she was pregnant turned her into a full-fledged grown up!

"The day she found out she was pregnant, she became a woman," Joe Simpson tells PEOPLE. "She's concerned about what she eats and how she prepares for the child and [details like], is the baby's room 'green' enough?" he explains. "It's a transformation you never expect as a parent – you pray for it, but never expect it. She's ready for this baby!"

And dad-to-be Pete Wentz is ready, too,

"Pete is the king of details, so he wants to make sure the baby's room is just right – the right colors, the right sheets, the right look," Simpson gushes. "He's a great parent."

Click below to read about who else is ready for the baby's birth, who isn't, and what the baby's name isn't!

Even Ashlee's big sister Jessica is eager for the baby to come - so eager he's having a hard time keeping her on tour!

"I'm trying to keep her out there until the baby's born," he adds. "I have a couple of other dates I need her to play!"

In fact, the only one not ready is Joe himself, who at 50, is "too young to be a grandpa! But I am excited." And the only thing Joe can reveal about the baby's name?

"I can tell you it's not Joe. I wished, I tried, but it didn't work."

Source: People

Photo: Gaz Shirley/PacificCoastNews.com, 10/05