Chicago veteran Ron Orbach is the latest addition to the cast of the 1950's-set musical and will play film producer Louis Goldman.

As previously reported by Playbill.com, O'Malley has replaced Erin Dilly, who bowed out of the new musical due to illness. O'Malley (Into the Woods, Annie Get Your Gun) joined rehearsals last week in the role of Rebecca Klemm.

Previously confirmed principal casting includes Felicia Finley (The Wedding Singer) as Hollywood starlet Hermia Chase; Jeffry Denman (The Producers) as Preston, the young Hollywood movie executive; Meredith Patterson (42nd Street) as Yvette; Stephen DeRosa (Hairspray) as Hamish; and comedic Broadway actress Alix Korey (The Wild Party) as Hilda.

The American in Paris ensemble includes Jeremy Benton, Sara Brians, Sae La Chin, Erin Crouch, Lianne Marie Dobbs, Michael Thomas Holmes, Drew Humphrey, James, Matthew Kirk, Tony Lawson, Alison Levenberg, Joseph Medeiros, Shannon M. O’Bryan, James Patterson, Wes Pope, Benjie Randall, Kristen J. Smith, JD Webster and Kristen Beth Williams.

Three-time Tony nominee Groener stars as Parisian music-hall star Michel Gerard, who fails to arrive for filming of a new Hollywood musical in which he is set to star. As filming in Paris is halted, the film's producer sends his reluctant secretary, Rebecca Klemm (O'Malley), to locate the missing star. While the 1951 MGM movie-musical presented Gene Kelly as the American in Paris, Tony-nominated playwright Ken Ludwig (Crazy for You) has fashioned a completely new take on the Gershwin classic, so that Miss Klemm is now the stranger in a strange land described in the title.

Alley Theatre artistic director Gregory Boyd directs the new musical, with a creative team that boasts choreographer Randy Skinner (42nd Street), set designer Doug Schmidt, lighting designer Paul Gallo and costume designer Carrie F. Robbins. Rob Berman — of the City Center Encores! series — serves as musical director with orchestrations by three-time Tony Award winner Doug Besterman (The Producers, Thoroughly Modern Millie, Fosse) and Larry Blank (Drowsy Chaperone).

The Gershwins' An American in Paris makes its world premiere April 29 and will officially open May 18. The Alley Theatre limited engagement runs through June 1.

Tickets are available by visiting www.alleytheatre.org or by calling (713) 220-5700.

The Alley Theatre is located at 615 Texas Avenue in Houston, TX.