Time to break out your easel and brush up on your color theory. Jake Gyllenhaal, for a special performance on October 24 to raise money for the New York City Center, will be portraying post-impressionist artist Georges Seurat in the musical Sunday in the Park With George. The Pulitzer Prize–winning musical — with music and lyrics by Stephen Sondheim and book by James Lapine — chronicles the various, often humorous life exploits of a fictionalized Seuret as he works on his seminal painting “A Sunday Afternoon on the Island of La Grande Jatte.” Gyllenhaal previously showed off his musical chops as a plant-shop employee last summer during a brief production of Little Shop of Horrors. Tickets for Sunday will be on sale beginning May 25, so alert your former art-history professor.