From left to right: Frank Sinatra, Dean Martin, Peter Lawford, and Sammy Davis Jr.

Sandy Hackett has written:

'The rat pack returns in the tribute to Frank, Sammy, Joey & Dean'

In 1960 Dean martin was in the rat pack with Frank Sinatra, Sammy Davis Jr., Peter Lawford, and Joey Bishop

Frank Sinatra was by far the most well known member of the rat pack. The other members of the rat pack include Sammy Davis Jr., Dean Martin, Joey Bishop, and Peter Lawford.

A young Frank Sinatra joined the Rat Pack in the 1950's.

The original (1950s) members of the Holmby Hills Rat Pack were Frank Sinatra (pack master), Judy Garland (first vice-president), Lauren Bacall (den mother), Sid Luft (cage master), Humphrey Bogart (rat in charge of public relations), Swifty Lazar (recording secretary and treasurer), Nathaniel Benchley (historian), David Niven, Katharine Hepburn, Spencer Tracy, George Cukor, Cary Grant, Rex Harrison, and Jimmy Van Heusen.