For one special evening, Amber Portwood and her precious daughter Leah lived in a pineapple under the sea with a famous aquatic creature.

The "Teen Mom" cast member -- who, along with Catelynn Lowell, Maci Bookout and Farrah Abraham, will be returning to MTV on March 23 -- treated her mini dancing queen to a fun-filled movie date. The flick starred a beloved animated character: the one and only Spongebob Squarepants.

"Booboo tonight after seeing the new spongebob movie in 3D...she loves those glasses lol...sending love," the "Never Too Late" author wrote along with the cute Twitpic above after viewing "The SpongeBob Movie: Sponge Out of Water." And the six-year-old couldn't look any more delighted to be at the theater in her blue shades as she proudly posed in front of a colorful display.

Little L's sunny disposition, as well as her purple, cartoon-style hat, makes her a perfect shoo-in to hang with S, Patrick and the rest of the lovable Bikini Bottom residents. In the words of the great sea sponge, "She's ready!"

+ Stay with MTV News for more updates on Amber and Leah's "Teen Mom OG" debut on Monday, March 23 at 10/9c -- and catch a sneak peek from the upcoming season below.