'The Secret Life of the American Teenager' Ends Tonight -- Watch Clips!

It’s finally here — the series finale of The Secret Life of the American Teenager airs TONIGHT!

In “Thank You And Goodbye,” high school graduation is finally here, prompting everyone to reminisce about how much their lives have changed over the past few years. Amy’s (Shailene Woodley) relationships with Ricky (Daren Kagasoff) and Ben (Ken Baumann) weigh heavily on her mind, while Grace (Megan Park) contemplates Jack’s (Greg Finley) place in her life.

Meanwhile, Adrian (Francia Raisa) is ecstatic when an unexpected visitor knocks on her door.

Today, ABC Family is airing an all-day “Secret Life” Fan Favorites marathon. Check out all the pics below and watch the clips in our slideshow!

“Thank You and Goodbye” airs TONIGHT @ 8PM ET/PT on ABC Family.