Dylan Walsh and Joanna Going

Nip/Tuck star Dylan Walsh has joined the growing list of celebrity couples calling it quits this week.

On Monday, Dexter's Michael C. Hall and Jennifer Carpenter announced they would divorce, while E! reported that Zac Efron and Vanessa Hudgens had split. On Tuesday, TMZ reported Scarlett Johannson and Ryan Reynolds had separated.

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Walsh, 47, filed for divorce on Friday from Joanna Going, TMZ.com reports. Walsh cited irreconcilable differences and asked for joint legal custody of the couple's 7-year-old daughter.

Going is Walsh's second wife. Before their six-year marriage, he was married to Big Love's Melora Walters.

His reps didn't respond immediately to TVGuide.com's request for comment.