While other celebrities are off getting engaged or married to their longtime loves, Hilary Duff and former hockey player Mike Comrie are unfortunately calling time on their own marriage.

Confirming the split today, the stars' representative stated that they "have mutually decided [upon] an amicable separation... They remain best friends and will continue to be in each other's lives. They are dedicated to loving and parenting their amazing son, and ask for privacy at this time."

An insider close to the couple said that "there was no major incident – no big event between the two of them. They really did drift apart. They have put effort and thought into this decision for a long time. They tried couples therapy, but in the end, they realized at this time, they work better as friends. And they really are great friends."

Duff took to her Twitter to reassure and thank her fans for their support: "Mike and I are sitting here,we are so appreciative for all of your kindness& well wishes. Not an easy day but we're getting thru it together [sic]."

The couple plan to co-parent their 21-month-old son, Luca.