It has been announced that Katharine McPhee will play the role of Jenna Hunterson in Waitress at the Adelphi Theatre with a final performance in June.McPhee originated the role of Jenna in the show's West End premiere, which began previews on 8th February before an opening night on 7th March.Waitress marks McPhee's West End debut, reprising her performance as Jenna from the Broadway production in 2018. Katharine McPhee will star in Waitress until 15th June where she will make her last...