Dec. 11 (UPI) -- William Shatner is headed for divorce.
Us Weekly confirmed Tuesday that Shatner, 88, filed for divorce from his wife, Elizabeth Shatner, 60, after 18 years of marriage.
E! News said Shatner cited "irreconcilable differences" for the split. Sources said the pair's divorce should be "quick and not complicated."
TMZ reported Shatner and Elizabeth Shatner are negotiating the financial terms of their divorce. The pair had a prenup, meaning neither party will receive spousal support.
Sources said Shatner and Elizabeth Shatner are expected to soon submit their divorce documents for a final signature from a judge. Shatner is being represented by attorney Laura Wasser.
Shatner and Elizabeth Shatner married in February 2001.
Shatner was previously married to Gloria Rand, Marcy Lafferty and Nerine Kidd, and has three daughters, Melanie, Leslie and Lisabeth, with Rand. Elizabeth Shatner was previously wed to Michael Glenn Martin.