Hugh Hefner celebrated his 87th birthday with a ''Casablanca Night''.

The Playboy founder reached the age today (09.04.13) but marked the occasion on Friday (06.04.13) with a screening of his favourite film - which starred Humphrey Bogart and is considered one of the greatest romantic movies of all-time.

Hugh was dressed in a white suit jacket, black trousers and a black bow tie just like Bogart for the bash at the Playboy Mansion in Los Angeles, while his 26-year-old wife Crystal looked stunning in a black dress with a white trim.

The publisher wrote on Twitter: ''We celebrated my birthday Friday night with friends and screened 'Casablanca,' my favorite film. These are happy days. (sic)''

The couple were joined by well over 50 guests, including a number of Playboy models. All the men in attendance also wore a white suit jacket and black bow tie in keeping with the theme.

Crystal took to her Twitter page today to wish her husband a happy birthday and urged all her followers to do the same.

She wrote: ''Happy birthday @hughhefner I love you! ... It's @hughhefner's birthday in 10 minutes west coast time! Everyone please go wish him a happy birthday! #April9 (sic)''