BREAKING: Sarah Palin's Husband Files for Divorce

Anchorage Daily News reports that Todd Palin, the husband of former Alaska governor and GOP vice-presidential candidate Sarah Palin, has filed for divorce.

In a document filed Friday in Anchorage Superior Court, Todd Palin, 55, asked to dissolve the marriage, citing an “incompatibility of temperament between the parties such that they find it impossible to live together as husband and wife.”

The divorce filing uses initials rather than full names, but identifies the couple’s marriage date and the birth date of their only child who is a minor, Trig Palin. The filing asks for joint legal custody of the child.

Anchorage attorney Kimberlee Colbo is representing Todd Palin in the divorce. In a filing, Colbo said she would ask the court to designate the divorce confidential as it moves forward.

Colbo did not immediately respond Monday to a request for comment from Todd Palin.

Sarah Palin, 55, was elected governor of Alaska in 2006.

Rumors of marital troubles have been floating around for years, including claims of a pending divorce, which were denied. But it looks like it's really happening now.

Sarah Palin had been a popular but relatively unknown governor when John McCain selected her as his running mate in 2008. Despite lack of experience in national politics, she held her own against veteran politician Joe Biden when they faced off in the vice-presidential debate, and delivered a stunning speech at the  2008 GOP Convention.

She resigned as governor in 2009 due to an onslaught of ethics investigations resulting in her high profile. She went on to build a national profile for herself with speaking engagements, a couple of books, a reality tv show, and by building up a presence on social media. There was speculation she might run for president in 2012, but that never happened. Despite rocketing to fame, many now feel she was a liability to the ticket, and she wasn't even invited to John McCain's funeral.