Big Markdowns for Unwed Pregnant Teen Couples

5/28/2008 1:10 PM PDT BY TMZ STAFF
Jamie Lynn Spears and the biological father of her unborn child, Casey Aldridge, spent Memorial Day just like all other famous, unmarried, expectant teen lovers -- at Wal-Mart.

The pregnant babies shopped for vittles and other discounted items at a local Mississippi branch of the super chain.