Dec. 18: The Second City sets the standard for comedic excellence, so it’s not surprising that when this talented crew decides to raise funds for Onward Neighborhood House, it pulls out a star-studded all-nighter. The marathon benefit begins at 6 p.m. and features 24 hours of nonstop comedy and music from an all-star cast. This year’s lineup includes improv sets from Olivia Wilde, Jason Sudeikis and Fred Armisen, plus performances from music legends Jeff Tweedy, Kim Deal and Bonnie Prince Billy. Tickets: $20. Second City e.t.c. Theatre, 1616 N. Wells. Tickets available at the door starting at 5 p.m. and will last throughout the event as long as seats are available. For more information, call (312) 337-3992 or visit Letterstosantachicago.com. —Thomas Connors

Dec. 18: The Second City sets the standard for comedic excellence, so it’s not surprising that when this talented crew decides to raise funds for Onward Neighborhood House, it pulls out a star-studded all-nighter. The marathon benefit begins at 6 p.m. and features 24 hours of nonstop comedy and music from an all-star cast. This year’s lineup includes improv sets from Olivia Wilde, Jason Sudeikis and Fred Armisen, plus performances from music legends Jeff Tweedy, Kim Deal and Bonnie Prince Billy. Tickets: $20. Second City e.t.c. Theatre, 1616 N. Wells. Tickets available at the door starting at 5 p.m. and will last throughout the event as long as seats are available. For more information, call (312) 337-3992 or visit Letterstosantachicago.com.

Olivia Wilde

Jeff Tweedy

Fred Armisen

—Thomas Connors