United Kingdom, Feb. 10 -- Patrick Schwarzenegger has revealed how he knew fiancee Abby Champion was "the one".

The 31-year-old actor son of Arnold Schwarzenegger first met his future wife when they were 21 and 18 respectively, and they have been together for nearly 10 years.

Reflecting on how he knew Abby would be in his future forever, he told People: "I think that when we first met, there was obviously an attraction - physical attraction - and I thought she was the most beautiful girl that I had seen and had met. And (I) was interested in hanging out and going out on dates.

"When we first met, I was 21, she was 18. So you're very different people and humans when you're that age versus now I'm 31, she's 27.

"Over the course of the y...