Yes, it is true. Hollywood idol Cary Grant was urged to take the role of James Bond in Dr. No (1962) by his close friend, the Bond producer Albert "Cubby" Broccoli, who had Grant as the best man at his wedding. In fact, both producers Albert R. Broccoli and Harry Saltzman originally sought out Grant. They discarded the idea as Grant would be committed to only one feature film; therefore, they decided to go after someone who could be part of a franchise. Also, Grant would have been 58 years old in 1962 (Roger Moore's age in 1985 when A View to a Kill was released, and Roger played Bond for the last time).

More Info: en.wikipedia.org