Jamie Lynn Spears and baby daddy Casey Aldridge register at Babies R Us

ey y'all, I'm knocked up, so pay up!

Pregnant tween star Jamie Lynn Spears and baby daddy Casey Aldridge have registered at Babies R Us, asking well-wishers to fulfill their every baby need.

The happy couple - otherwise known as Registry No. 70391760 from Kentwood, La. - thanked gift-givers in advance.

"Thank you for supporting us during this special time," the young, unmarried couple wrote in their online registry.

The 16-year-old sister of pop wreck Britney Spears registered at a store in Baton Rouge and did some shopping of her own.

It's been widely reported that Jamie Lynn and Aldridge, 18, are planning to tie the knot.

She appeared to be sporting an engagement ring yesterday as they sashayed through store aisles wearing a T-shirt that read: "The Rumors Are True."

Spears, star of Nickelodeon's "Zoey 101," is due in July.
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