The "The Talk" co-host and comedian will reprise her role as Justice of the Peace Clarice Collins for a fourth time on Monday's edition of the daytime drama.
"Underwood shares a scene with Eric Braeden [who plays Victor Newman] and Melody Thomas Scott [who plays Nikki Newman,]" the network said in a news release.
"In the episode, complications from Nikki's recently diagnosed multiple sclerosis have landed her in the hospital and interrupted Victor and Nikki's wedding. To cheer up his disappointed bride, Victor decides to throw her 'a wedding a day,' and Underwood's Justice Collins is called in to perform one of the ceremonies. The Newmans will have their actual wedding the week of March 18."
The soap opera will celebrate its 40th anniversary March 26.