Dimitri Snowden and Christeline Peterson

Credit: Dimitri Snowden/Instagram; TLC

Dimitri Snowden and Christeline Peterson's marriage is over.

Dimitri, star of TLC's Seeking Sister Wife, filed for divorce on Tuesday, according to court documents obtained by PEOPLE. Dimitri listed their date of separation as Jan. 21, citing "irreconcilable differences" as the reason for the split. The exes, who wed last July, do not share children.