Lucky the Cat is the Tanner family pet in the ALF TV series. After ALF comes to live with the Tanner family, Lucky's existence becomes somewhat more precarious, since cats are cullinary delicacy on Melmac. Once during a feeding frenzy, ALF is believed to have eaten Lucky, but he is later found.
Lucky passes away in the fourth season (Episode 4x09 "Live and Let Die") and the Tanner's get a new cat and name it Lucky II.