Chalk up the expansion of Marietta ChalkFest to popularity.

The free fest returns for its fourth edition this weekend, with more than 40 professional chalk artists from around the country, double last year's number, coloring their masterpieces around the Marietta Square from 10 a.m. to 5 p.m. Saturday and Sunday. There also will be a public non-professional juried chalk art competition for all ages from 10 a.m. to 2 p.m. Saturday (entry fee required).

The variety band Prime will play a free concert in Glover Park from 6 to 9 p.m. Saturday, and a vendor's marketplace and kid's activities will be available both days.

Festival organizer the Marietta/Cobb Museum of Art , 30 Atlanta St. S.E., will be open for free both days. 770-528-1444, mariettachalkfest.com.

"Brooke" by Shellie Lewis-Dambax.

Credit: hpousner

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Credit: hpousner

While you're visiting the Marietta Square, it's a great opportunity to check out its fine art galleries, including:

dk Gallery is showing "Shields and Boundaries," mixed-media works by Shellie Lewis-Dambax. Also on view: ceramic sculpture by Kirsten Stingle. 25 W. Park Square. 770-427-5377, www.dkgallery.us.

2 Rules Fine Art is exhibiting "Pressing Matters V: Atlanta Printmakers Studio Annual Members Exhibition," featuring hand-pulled prints by 30 Georgia artists. 85 Church St., Marietta. 404-355-6897, www.2rulesfineart.com.