VIDEO: Promo for Final Season of SECRET LIFE OF AN AMERICAN TEENAGER

An all-day marathon of "The Secret Life of the American Teenager" will air on Monday, March 18 from 11:00 AM - 8:00 PM ET/PT, leading into the premiere of the final season, starting at 8:00 PM ET/PT. Check out a promo for the upcoming season below!

In the all-new episode, "To Each Her Own," Amy and Ricky continue planning their wedding, so Amy buys her dress - at a thrift store. The dress is a little worse for wear - but only Amy sees the potential to make it great. Meanwhile, Ricky is upset about the dress and Adrian thinks the dress reflects her feelings about getting married. Kathy is conflicted about going back home after having the baby, and Ethan begs his parents to let him fly to Texas with her to ask Kathy's parents if she can stay. Jack is still recovering and is in love with Grace. George tells Anne about seeing David with biological children, which makes her question Robie's paternity. And George and Kathleen run into guest star, Chaz Bono (playing himself), at a restaurant where they are discussing whether Robie is George or David's child.

The series cast includes Shailene Woodley, Ken Baumann, Greg Finley, Daren Kagasoff, Megan Park, Francia Raisa, Michael Grant, Cierra Ramirez with Steve Schirripa. In "To Each Her Own," the guest stars include Chaz Bono, Anne Ramsay, L. Scott Caldwell, De'Vaughn Nixon, Tricia O'Kelley, Marielle Jaffe, Ben Weber, Natalie Dreyfuss with Diane Farr; special guest stars include Mark Derwin, Josie Bissett and Molly Ringwald.

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