Former Friends star Matt LeBlanc and his wife of three years, Melissa McKnight, finalized their divorce Wednesday, according to court documents obtained by PEOPLE.

LeBlanc and McKnight will share joint and legal custody of their 2-year-old daughter, Marina (who has suffered from a brain disorder). LeBlanc will provide $15,000 a month for child support until Marina turns 18. He will also cover 100 percent of her medical and nanny costs and school tuition. Both LeBlanc and McKnight waive all claims for spousal support.

The couple separated last January, when LeBlanc, 39, announced he was moving out of the Encino, Calif., home he shared with McKnight, 41, their daughter and McKnight's two children from a previous marriage. "It was very sudden," McKnight's longtime friend Kelly Phillips told PEOPLE at the time. "She was absolutely blindsided by what transpired." Citing "irreconcilable differences," LeBlanc filed for divorce in March. "The dissolution is amicable," his publicist Joe Libonati said in a statement. "They remain devoted parents and friends."

Shortly thereafter, PEOPLE reported that LeBlanc had been involved with his Joey costar Andrea Anders, 31. Although the new couple are still together, the show didn't fare as well; it was cancelled in May.

LeBlanc and McKnight, a former model, were introduced in 1997 by actor Lou Diamond Phillips and his then-wife, Kelly. After a five-year engagement, they were married on May 3, 2003, in Hawaii in front of 75 guests that included former Friends costars Jennifer Aniston, Courteney Cox and Lisa Kudrow.