Kat Dennings Instagram photo with Lindsay Lohan for her upcoming appearance on "2 Broke Girls" broke big on Twitter.

"Mean Girls" star Lindsay Lohan is filming for her upcoming guest appearance on 2 Broke Girls. Lohan plays Claire Guinness, a bridezilla who asks Max, played by Kat Dennings, and Caroline, Beth Behrs, to make her wedding cake.

The Kat Dennings Instagram photo shows Lindsay Lohan in a wedding gown for her upcoming guest stint on "2 Broke Girls." Kat Dennings posted the Instagram photo of the two of them on the set.

Kat Dennings posted the Instagram pic with the caption "S--t gets real in upcoming episodes of 2 Broke Girls."

27-year-old star Lindsay Lohan took to Twitter to tell her fans where they can find her. Lohan tweeted "#2BROKEGIRLS & A "MEAN" ONE: Its true!!  Excited to be back on set and work w/ @officialkat and @bethbehrs."

Lindsay Lohan added a note to fans that she was "sharing with you guys a preview wedding moment on set #2brokegirls xo L."

Lindsay Lohan will appear on the CBS sitcom "2 Broke Girls" on  April 14. Lohan's character, Claire Guinness is an indecisive bride-to-be who brings her wedding nightmare to Kat Dennings and Beth Behrs. Lindsay Lohan also got married on a recent episode of "Eastbound & Down."  

Lohan's new docu-series, "Lindsay" can be seen on Oprah Winfrey's OWN Sundays at 10 P.M. ET. Lohan's most recent TV appearances include guest appearances on "Anger Management." Lindsay also played the role of Hollywood Icon Elizabeth Taylor in Lifetime's biopic "Liz & Dick."