Olympic medalist Gabby Douglas is coming to Austin for Wizard World Comic Con. The gymnast will sign autographs, pose for photo ops and conduct an interactive Q&A panel from 3-6 p.m. Sept. 23. Other celebrities making appearances over the weekend include William Shatner ("Star Trek"), Danny Trejo ("Machete"), Sebastian Stan ("Captain America: Civil War") and Matt Smith ("Doctor Who"). Wizard World is at the Austin Convention Center from 3-8 p.m. Sept. 23, 10 a.m.-7 p.m. Sept. 24 and 10 a.m.-4 p.m. Sept. 25. Admission is $39.95-$90; as many as two children 10 and younger may enter for free with a paid adult. There are additional fees for autographs and photo ops. Find out more and buy tickets at wizardworld.com/comiccon/austin.

More things to do this weekend

Home Slice Pizza’s Carnival O’ Pizza. The 11th annual event returns to the iconic South Congress location with all proceeds benefiting Austin Bat Cave. The family-friendly celebration will be bigger than ever, boasting over-the-top pizza-themed activities and exciting prizes, including the chance for one lucky raffle winner to earn a reservation at Home Slice for the next year. The activities include pizza-tossing and pizza-eating contest, as well as a magic show from Albert Lucio, blitz freestyle breakdancers and more. Noon to 7 p.m. Sept. 24. Free. 1415 and 1421 S. Congress Ave. facebook.com/events/353202875011080.

Esquina Tango’s 10-Year Anniversary. The Latino cultural heritage nonprofit is celebrating 10 years with a party that will have indoor and outdoor dance floors, entertainment by belly dancers, a special cocktail, bites from a food truck and more. There will also be a VIP portion of the evening with a silent auction, wine and tapas-style food from Takoba and Buenos Aires Cafe, and more. 5:45 p.m. Sept. 24. $20-$40 general admission; VIP tickets on waitlist. esquinatangoaustin.com.

Rolling Roadshow at the Salt Lick. The Salt Lick, in partnership with the Alamo Drafthouse, has brought back the movie series at the restaurant’s Pecan Grove and continues the fall screenings with director Joss Whedon’s Western-flavored sci-fi adventure "Serenity." The film kicks off at twilight with a tasty Salt Lick barbecue buffet; plus, like always, you can bring the beverage of your fancy. 6:30 p.m. Sept. 25. $38. 18300 FM 1826, Driftwood. drafthouse.com/event/roadshow2016.

Tickets on sale

"Mamma Mia," the hit musical based on the songs of Abba, returns to Bass Concert Hall on Jan. 27-28 as part of the Lexus Broadway in Austin season, presented by Texas Performing Arts. Tickets, which start at $35, go on sale Sept. 23 and are available via BroadwayinAustin.com, the Bass Concert Hall box office, all Texas Box Office Outlets or by phone at 512-477-6060.

Next week in Austin360: Our guide to the Austin City Limits Music Festival, including critics’ picks, festival map and schedule and more.