The illustrious Lynn Wyatt has chaired or been honored at innumerable Houston Grand Opera fêtes and even presided over the 50th anniversary festivities, which brought Elton John to town. Now she takes on a different role — on stage. She’s been tapped by HGO for its latest, Francesca Zambello’s brilliant new staging of Show Boat, the beloved musical by Jerome Kern and Oscar Hammerstein II, based on the Edna Ferber novel. Watch for Wyatt’s cameo as the Lady on the Levee in the final act, where she trades her signature Valentino and Chanel for 19th-century elegance. At the Wortham Theater Center, January 18 – February 9; tickets houstongrandopera.org.