Billy Crystal exclusively tells PEOPLE how he and his wife, Janice Crystal, have stayed married for 54 years. At the premiere of his new show, 'Before,' the actor explains they have maintained "respect,

Billy Crystal offered valuable advice on keeping the spark alive in marriage after being married to his wife, Janice Crystal, for more than five decades.In a conversation with People Magazine at

Billy Crystal's 54-year marriage to wife Janice is founded in "respect, humour, honesty". The 'When Harry Met Sally ... ' star has been married to Janice since 1970 and they are parents to grown-up daughters Jennifer and Lindsay - and now the 76-year-old actor has revealed what it takes to sustain a healthy and happy relationship over five decades.