Universal Pictures has released five clips from writer/director Judd Apatow’s new film This Is 40.  For those unaware, the pic is a “sort-of sequel” to Apatow’s 2008 film Knocked Up, and continues the story of the characters played by Paul Rudd and Leslie Mann five years later as they’re navigating new challenges to their careers, parents, marriage, and children.

Hit the jump to watch the clips.  The film also stars Albert Brooks, John Lithgow, Maude Apatow, Iris Apatow, Megan Fox, Chris O’Dowd, Charlyne Yi, Jason Segel, and Melissa McCarthy.  This Is 40 opens on December 21st.

Here’s the official synopsis for This Is 40:

Writer/director/producer Judd Apatow (The 40-Year-Old Virgin, Funny People) brings audiences This Is 40, an original comedy that expands upon the story of Pete (Paul Rudd) and Debbie (Leslie Mann) from the blockbuster hit Knocked Up as we see firsthand how they are dealing with their current state of life.