Entertainment Tonight

Is the pregnant Ashlee Simpson-Wentz going to induce labor? Big sis Jessica Simpson talked to Ellen DeGenerous about the status of her about-to-pop sibling on Monday!

"They're going to have to [induce] -- it's already developing really quick," Jessica said at a taping of the "The Ellen DeGeneres Show" to air Wednesday.

Rocker hubby Pete Wentz described his wife as "due any moment" on the radio to Ryan Seacrest two weeks ago, and Jessica said that Ashlee has already tried a variety of different methods to help induce labor.

"Different foot massages and stuff," Jessica told Ellen. "I don't know. I think she's really just jumping around trying everything right now."

Watch ET for all the latest Simpson baby news!