The 34-year-old actor filed in Los Angeles Superior Court on Thursday. Johansson, 26, filed her divorce response simultaneously.
Both parties list Dec. 14 as their date of separation, and neither individual is seeking spousal support.
Reynolds and Johansson publicly announced their split on Dec. 14 saying, "After long and careful consideration on both our parts, we've decided to end our marriage. ... We entered our relationship with love and it's with love and kindness we leave it."
The couple began dating in 2007 and married in a private ceremony in Canada in 2008.
Reynolds will next be seen in The Green Lantern. Johansson was recently cast in Cameron Crowe's new film, We Bought a Zoo.