The Tony Award-winning Broadway production of Once celebrated its 500th performance with their Wednesday matinee on May 29. The performance also marked the official opening for new cast members Arthur Darvill and Joanna Christie as leads Guy and Girl, as well as Katrina Lenk and Carlos Valdes as Reza and Andrej. Following the show, Anne L. Nathan, who plays Baruska, introduced the new stars and helped bring on a celebratory cake.

Check out the festivities in the gallery below.