Wilkas co-wrote with American actor and Playwright Mark Setlock titled Pageant Play, a satire about the world of child beauty pageants. The play was produced in July 2008 at the Berkshire Theatre Festival. and in 2012, he was in the stage production Spider-Man: Turn Off the Dark replacing main actor Matt Caplan. Wilkas has appeared on stage in a number of acts including Silence! (The Musical), The Last Sunday in June, Far and Wide, The Pride etc. He has appeared in The Williamstown Theatre Festival, The Huntington Theatre Company, The Berkshire Theatre Festival, The Rattlestick Playwrights Theater, and The Sundance Theatre Institute, under the direction of Michael Greif, Anna D. Shapiro, Will Frears, Carolyn Cantor, Mark Brokaw, Nicholas Martin, and Trip Cullman.