Conversation so far:
Was Cary Grant involved with business?
After Cary Grant retired from the screen, he became more active in business. He accepted a position on the board of directors at Fabergé.
What was one of Cary Grant's first business endeavors?
Cary Grant accepted a position on the board of directors at Fabergé.
Did Cary Grant do his job on the board of directors at Fabergé well?
George Barrie once claimed that Grant had played a role in the growth of the firm to annual revenues of about $50 million in 1968, a growth of nearly 80%.
What other business ventures did Cary Grant pursue besides a position in the board of directors at Faberge?
In 1975, Cary Grant was an appointed director of MGM.
What did Cary Grant do at MGM as appointed director?
Cary Grant played an active role in the promotion of MGM Grand Hotel in Las Vegas when opened in 1973, and he continued to promote the city throughout the 1970s.

Question: How long was he on the board?
Self-contained rewrite: How long was Cary Grant on the board of MGM?