Yes...they can. I do not think it is a career (i might be wrong) or profession. However, once you reach a certain amount of celebrity stars, you will get an agent. the agent will tell you about opportunities which involve theater, acting etc...
The cast of The Sims Vacation - 2002 includes: Donna Le Tourneau as Sims Voice
The cast of Zoot Sims - 1985 includes: Rune Gustafsson as himself
The cast of The Sims Unleashed - 2002 includes: Donna Le Tourneau as Sim
The cast of Young Blood - 2010 includes: Jack Sims as himself Mckenzie Sims as himself
The cast of Molly Sims Dramatic Acting Reel - 2009 includes: Bart Folkerts Joe Hartzler Molly Sims Robert Sisko Monika Smith
The cast of Destroying Jonah Hill - 2008 includes: Anna Castelaz as Liz Steven Sims as Steven Sims
The cast of Placenta - 1991 includes: Jeremy Sims as Boy
The cast of The Twelve Pound Look - 1950 includes: Iris Baker as Lady Sims Belle Chrystall as Kate Sims David Markham as Himself - Introduction Ivan Samson as Sir Harry Sims
the sims the sims house party the simss vacation the sims unleashed the sims livin large the sims hotdate the sims makin magic the sims super star
The cast of Tick - 2002 includes: Paolo Rotondo Jeremy Sims
The cast of Passivity - 2005 includes: Wayne Lamont Sims as Chad
The cast of Darkness - 1923 includes: Wallace Bosco Hilda Sims