Dudley Stuart John Moore, CBE (19 April 1935 – 27 March 2002), was an English actor, comedian and musician.
Moore first came to prominence as one of the four writer-performers in Beyond the Fringe in the early 1960s and became famous as half of the hugely popular television double-act he formed with Peter Cook. His fame as a comedic actor was later heightened by his success in Hollywood movies such as 10 with Bo Derek and Arthur in the late 1970s and early 1980s, respectively. He was often known as "Cuddly Dudley" or "The Sex Thimble", a reference to his short stature and popularity with women.
His musical talent won him a scholarship to Magdalen College, Oxford and whilst studying music and composition there, he performed with Alan Bennett in the Oxford Revue. Bennett then recommended him to the producer putting together Beyond the Fringe, a comedy revue, where he was to first meet Peter Cook. Beyond the Fringe was at the forefront of the 1960s satire boom and after enormous success in Britain, it transferred to the USA where it was also a major hit.
During his university years, Moore took a great interest in jazz and soon became an accomplished jazz pianist and composer, as well as working with such leading musicians as John Dankworth and Cleo Laine. In 1960, he left Dankworth's band to work on Beyond the Fringe. During the 1960s he formed the acclaimed "Dudley Moore Trio" (with drummer Chris Karan and bassists Pete McGurk and later Peter Morgan). Moore's admitted principal musical influences were Oscar Peterson and Errol Garner. In a later interview he recalled the day he finally mastered Garner's unique left hand strum, and he was so excited he walked around for several days with his left hand constantly playing that extraordinary cadence. His early recordings included "My Blue Heaven", "Lysie Does It", "Poova Nova", "Take Your Time", "Indiana", "Sooz Blooz", "Bauble, Bangles and Beads", "Sad One for George" and "Autumn Leaves". The trio performed regularly on British television, made numerous recordings and had a long-running residency at Peter Cook's club, The Establishment.
Moore composed the soundtracks for the films Bedazzled, Inadmissible Evidence, Staircase, and Six Weeks, among others.
In the early 1970s, he had a brief relationship with British singer-songwriter Lynsey De Paul, whom he met at a party.
Their three albums of the late 1970s as Derek and Clive, were widely condemned for their use of obscene language and shocking, ad-libbed content. Shortly following the last of these, Ad Nauseam, Moore made a break with Cook, whose alcoholism was affecting his work, to concentrate on his film career. When Moore began to manifest the symptoms of a disease that eventually killed him (progressive supranuclear palsy), it was at first suspected that he too had a drinking problem. Two of Moore's early starring roles, were the titular drunken playboy Arthur, and to a lesser extent the heavy drinker George Webber in 10.
Moore was nominated for a Best Actor Academy Award but lost to Henry Fonda (for On Golden Pond). He did, however, win a Golden Globe award for Best Actor in a Musical/Comedy. In 1984, Moore had another hit, starring in the Blake Edwards directed Micki + Maude, co-starring Amy Irving. This won him another Golden Globe for Best Actor in a Musical/Comedy.
His subsequent films, including an Arthur sequel and an animated adaptation of King Kong, were inconsistent in terms of both critical and commercial reception. In later years Cook would wind-up Moore by claiming he preferred Arthur 2: On the Rocks to Arthur.
In addition to acting, Moore continued to work as a composer and pianist, writing scores for a number of films and giving piano concerts, which were highlighted by his popular parodies of classical favourites. In addition, Moore collaborated with the conductor Sir Georg Solti to create a 1991 television series, Orchestra!, which was designed to introduce audiences to the symphony orchestra. He later worked with the American conductor Michael Tilson Thomas on a similar television series from 1993, Concerto!, likewise designed to introduce audiences to classical music concertos.
In 1987, he was interviewed for the New York Times by the music critic Rena Fruchter, herself an accomplished pianist. They became close friends. At that time Moore's film career was already on the wane. He was having trouble remembering his lines, a problem he had never previously encountered. He opted to concentrate on the piano, and enlisted Fruchter as an artistic partner. They performed as a duo in the U.S. and Australia. However, his disease soon started to make itself apparent there as well, as his fingers would not always do what he wanted them to do. Symptoms such as slurred speech and loss of balance were interpreted by the public and the media as a sign of drunkenness. Dudley Moore himself was at a loss to explain this. He moved into Fruchter's family home in New Jersey and stayed there for five years, but this, however, placed a great strain on both her marriage and her friendship with Moore, and she later set him up in the house next door.
Moore was deeply affected by the untimely death of Peter Cook in 1995, and for weeks would regularly telephone Cook's home in London just to get the telephone answering machine and hear his friend's voice. Moore attended Cook's memorial service in London and at the time many people who knew him noted that Moore was behaving strangely and attributed it to grief or drinking. In November 1995, Moore teamed up with friend and humorist Martin Lewis in organizing a two-day salute to Cook in Los Angeles which Moore co-hosted with Lewis.
He maintained good relationships with Kendall particularly, and also Weld and Lane. However, he expressly forbade Rothschild to attend his funeral. At the time his illness became apparent, he was going through a difficult divorce from Rothschild, despite sharing a household in Los Angeles with not only her but also her previous husband.
Moore dated and was a favourite of some of Hollywood's most attractive women, including the statuesque Susan Anton.

On 30 September 1999, Moore announced that he was suffering from the terminal degenerative brain disorder Progressive Supranuclear Palsy, and the illness had been diagnosed earlier in the year. 
He died on 27 March 2002, as a result of pneumonia, secondary to immobility caused by the palsy, in Plainfield, New Jersey. Rena Fruchter was holding his hand when he died, and she reported his final words were "I can hear the music all around me". Moore was interred in Hillside Cemetery in Scotch Plains, New Jersey. Fruchter later wrote a memoir of their relationship (Dudley Moore, Ebury Press, 2004).
In December 2004, the UK's Channel 4 television network broadcast Not Only But Always, a television movie dramatising the relationship between Moore and Cook, although the focus of the production was on Cook. Around the same time, the relationship between the two was also the subject of a stage play called Pete and Dud: Come Again.