We're The Millers is an underrated comedy from 2013 starring Jason Sudeikis, Emma Roberts, Will Poulter and Jennifer Aniston and follows a small-time pot dealer who creates a fake family to smuggle drugs out of Mexico in an RV. After the fake family successfully crosses the border and evades border security with their RV full of marijuana, they turn on some music and sing along to TLC's "Waterfalls."

However, in a blooper, We're the Millers' cast and crew turned that moment into a prank on Aniston. Instead of playing "Waterfalls," The Rembrandts' "I'll Be There for You" plays. Of course, that song is most famous for being the theme song for Friends, the sitcom that launched Aniston into superstardom for playing Rachel Green.

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The deleted scene continues as the cast sings and claps along to the song, and Aniston seems to go through a series of emotions in reaction to the prank. Overall, she is a great sport about it, but the prank put a variety of different looks on her face nonetheless. Recently, after the release of Friends: The Reunion, Aniston explained the complicated emotions she felt while shooting the special and how emotional returning to that place actually was. As such, it's possible this prank on the set of We're The Millers may have elicited a similar complicated and emotional response.

Roberts looks like she is about to break even prior to the Friends' theme song, implying they were all in on the joke except Aniston. Roberts even expresses that she loves the song with a little extra zing, suggesting she's genuinely a big fan of the series or, at least, very excited about the joke. Meanwhile, the rest of the cast sings along enthusiastically and even time their claps to match those in the song.

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Aniston then turns to the camera near the end of the blooper and acknowledges the quality of the prank. She appears to be shocked at first but makes eye contact with the different cameras to let everyone know she gets the joke. Although she emotionally covers her face, she ultimately smiles and gives kudos to the jokers around her.

Aniston played Rachel for 10 seasons on Friends, and she's earned much success beyond that role, including Golden Globe nominations for The Morning Show and Cake. However, she'll always be most associated with her breakout role as Rachel. This is evident in the prank pulled on her by We're the Millers' cast and crew.

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