- Mervyn directed 13 different actors in Oscar nominated performances.
- Mervyn won the Cecil B. DeMille Award in 1957 for outstanding contributions to the entertainment field.
- Mervyn directed his first film, No Place to Go, in 1927.
- It was Mervyn who introduced actor and future US President Ronald Reagan to Nancy Davis, the actress he later married and made his First Lady.
- In 1943, Mervyn was nominated for Best Director for the movie Random Harvest, but did not win.
- Mervyn directed 79 films in his career.
- Mervyn won the Irving G. Thalberg Memorial Award in 1976 for "high quality, creative, motion picture production."
- Mervyn was married three times, and two ended in divorce. He had two children.
- Mervyn has a Star on the Walk of Fame.
- Mervyn stood 5'7" tall.
