Lea Michele, Heather Morris, Naya Rivera, Amber Riley, Jenna Ushkowitz and Vanessa Lengies posed for a photo similar to the film's poster recently.
The image comes after Michele's character Rachel recently announced her engagement to Finn (Cory Monteith).
Michele posted the Bridesmaids tribute on her Twitter page, adding: "In anticipation of tomorrow's very memorable episode... We took this photo."
Michele added: "We call it GLEE-MAIDS."
Glee will air its winter finale tonight at 8/7c on Fox and will go on a seven-week hiatus before returning on April 10. The show will return in the UK on March 1 on Sky1.
> Glee star Vanessa Lengies promises 'jaw-dropper' episode
> Glee: 'On My Way' in pictures
> Glee concert tour cancelled for 2012
Watch a promo for the next episode of Glee below: