From the BBC
"Wright appeared on the group's first album, The Piper at the Gates of Dawn, in 1967 alongside lead guitarist Syd Barrett, Roger Waters and Nick Mason.
Dave Gilmour joined the band at the start of 1968 while Barrett left the group shortly after wards.
Gilmour said: "No-one can replace Richard Wright - he was my musical partner and my friend."
Writing on his website, he added: "In the welter of arguments about who or what was Pink Floyd, Rick's enormous input was frequently forgotten."
Wright's spokesman said in a statement: "The family of Richard Wright, founder member of Pink Floyd, announce with great sadness that Richard died today after a short struggle with cancer.
"The family have asked that their privacy is respected at this difficult time."
He did not say what form of cancer the self-taught keyboard player and pianist had."
Needless to say, his absence will be greatly felt, and he leaves a vast legacy in music. God Bless Rick. He has gone on to the great gig in the sky. Send our regards to Syd.