The role of James Bond was an elite gig; only six can claim to have held the title. Moore made his debut as Bond in 1973's "Live and Let Die" and cemented his legacy as one of the most popular actors to take on the role of the suave spy with six additional Bond films.
Daniel Craig, the current James Bond, shared a short and sweet tribute to his predecessor via the official James Bond Twitter account.
Pierce Brosnan, who starred as the spy in four films from 1995 to 2002, penned a lengthier message on his Instagram account alongside a photo of both men in classic Bond suits.
"Dear Sir Roger Moore, It is indeed with a heavy heart that I hear the news of your passing this morning," he wrote. "You were a big part of my life, from The Saint to James Bond… you were a magnificent James Bond and one that lead the way for me, the world will miss you and your unique sense of humor for years to come. My sincerest condolences to your family and children. RIP."
Meanwhile, George Lazenby, who took on the role just once, in 1969's "On Her Majesty's Secret Service," also chimed in on Moore's unexpected passing.
"He was one of the good guys and will be missed by many," Lazenby told British newspaper The Daily Express. "I know he was loved by his family and many others."