Theatre
Arnaz has had a lengthy career in musical theatre. In June 1978 she played the title role of Annie Oakley in Annie Get Your Gun at the Jones Beach Theatre on Long Island, New York. This was the first production at Jones Beach Theatre after the death of longtime producer Guy Lombardo. In 1981, she played the lead female role of Rita White in Educating Rita at The Cape Playhouse in Dennis, Massachusetts.
She made her Broadway debut in February 1979 in the musical They're Playing Our Song. Arnaz won the Theatre World Award
and the Los Angeles Drama Critics Circle Award for Best Actress in a Musical for her portrayal of Sonia Walsk. In 1986, she won the Sarah Siddons Award for her tour with Tommy Tune in the international company of the musical My One and Only.
She has numerous other theater credits, both in the United States and abroad: Seesaw (first national company, 1974), Whose Life Is It Anyway?, The Guardsman (Paper Mill Playhouse, Millburn, New Jersey, January 1984), The Wizard of Oz in Concert: Dreams Come True (Concert at Lincoln Center, 1995, televised), Sonia Flew (Coconut Grove Playhouse, Florida, April 2006), The Witches of Eastwick (London, Theatre Royal, Drury Lane, June 2000), Vanities (Mark Taper Forum, Los Angeles, 1976 as Kathy), Neil Simon's Lost in Yonkers (Broadway), Dirty Rotten Scoundrels (Broadway, May 23, 2006, to September 3, 2006), and Terence McNally's Master Class (Seacoast Repertory Theatre, Portsmouth, New Hampshire, April to May 1999).
In 2010, Arnaz performed (along with Raúl Esparza and Valarie Pettiford) in and directed Babalu: A Celebration of the Music of Desi Arnaz and His Orchestra. A Miami, Florida performance was given in July 2010.
She toured in Pippin in 2014, playing the role of Berthe, the title character's grandmother. She appeared on Broadway in Pippin, from October 9, 2014, to November 9, 2014.