The long-awaited Mariah-Tessa wedding will be the first LGBTQ wedding the 49-year-old "The Young and the Restless" has ever aired and both Camryn Grimes and Cait Fairbanks understand the gravity of that milestone.

"It's a lot of pressure, but for us it was just like another day at work," Grimes told ET Canada. "And then ... the enormity of it hits you and you realize what is being taped is ... I mean it is ... it's history."

For Grimes, it will also be a first for her on the soap she has called home since 1997. The actress was only a child when she joined "Y&R" as Cassie Newman and played her until 1985 when the character was killed as a teen. Although Grimes made appearances as Cassie's ghost, she didn't rejoin the soap regularly until 2014 when Cassie's heretofore-unheard-of twin, Mariah Copeland arrived in town (via Soaps In Depth). After spending so much of her life on the CBS soap, the recently-engaged Grimes finally gets to have an on-screen wedding.