Sarah Ferguson's whereabouts unknown as former Prince Andrew’s shock arrest on birthday rocks royals

Sarah Ferguson's whereabouts are unknown following the shock arrest of her ex-husband, the former Prince Andrew.

Andrew Mountbatten-Windsor, 66, was arrested Thursday — his birthday — on suspicion of misconduct in public office during an inquiry linked to his ties with Jeffrey Epstein. 

The late queen’s favorite son is the first senior British royal to face arrest since King Charles I nearly 400 years ago. After being held for 11 hours, Thames Valley Police confirmed to Fox News Digital that he was later released.