cary grant and irene dunne catch each other in a white lie and the quarrel lead to a marriage breakup . the only bone of contention be that there a dog who be a family pet that they both love . they go to court and dunne with a bit of trickery win the custody battle . this be one of those comedy where the people can not live with each other or without each other and both be too stubborn to admit it . cary get himself involve with society debutante marguerite churchill and irene take up with mother fixate oil millionaire ralph bellamy . any fan of old hollywood film can tell you how this one will end . my favorite bit be when irene crash the churchill household with cary there and pretend to be his drunken floozy of a sister . leo mccarey win an oscar for best director and irene and bellamy be nominate for best actress and best support actor . mccarey keep the laugh come and take advantage of the talent of all his player and irene voice and cary gift for physical comedy . and a for mr. smith the little terrier who find out he not all that cary and irene have in common . well he one lucky little fellow to be in a classic comedy like this .