United Kingdom, March 3 -- Christina Applegate knew her first marriage was destined to fail - even as she was walking down the aisle.

The 53-year-old actress reflects on her 2001 wedding to actor Johnathon Schaech, 56, in her candid new memoir, You with the Sad Eyes, admitting she was gripped by doubt the moment the ceremony began.

The Hollywood star wrote: "When I looked hard at the face of my husband-to-be, I thought, 'Oh f***. F***, oh f***.'"

Despite the realisation, the Dead to Me star never considered calling it off.

Christina reflected: "For a start, I was halfway down the aisle. I kept thinking, 'Don't be that guy. Don't be that guy. Don't be that guy. You're sabotaging.'"

The Married with Children alum described the wedding ...