But fans who have been queuing up to get a picture at the platform made famous by the books, have also left tributes to the actor. A tribute to #AlanRickman", as another added: "Here was King's Cross Platform 9 3/4 a few minutes ago.
Kate, who starred alongside Alan in 1995 movie "Sense and Sensibility", released a statement in tribute to her former co-star, admitting her life "was enriched by knowing him".
While there are many successful films whose actors and directors may not be well known outside United States of America or Canada, but Alan Rickman was someone who was equally popular throughout the world.
Tucci remembered the couple coming to stay with him and his family in America; Rickman's "imminent arrival throwing my three children into paroxysms of excitement and fear as Harry Potter was basically the only thing on their minds in those days".
Hordes of global fans took to Twitter to express their sadness, encouraging each other to re-enact the poignant moment during the series when Hogwarts pupils pay tribute to their deceased headmaster Dumbledore.
Grint tweeted: "A huge talent and great gentleman".
"People create perceptions of actors based on the parts they played so it might surprise some people to learn that contrary to some of the sterner (or downright scary) characters he played, Alan was extremely kind, generous, self-deprecating and amusing", Radcliffe wrote.
Rickman is survived by his partner of 50 years, Rima Horton, whom he married recently.
However, just because the Brit is gone, doesn't mean we've seen the last of him! "It was great, because no one was there". "After the ceremony in NY, we walked across the Brooklyn Bridge and ate lunch".
Alan boasts a glittering career, spanning four decades. In 1985, he played Le Vicomte de Valmont in the stage version of Les Liaisons Dangereuses, his first major villain, and the breakthrough role for which he was nominated for a Tony Award in 1988.
At this point, Potter's Professor Snape appears to deliver his touching thoughts about love.
Abe Vigoda dead: Celebrities react
The television series not only made him popular among the film fraternity, but he was a name being remembered by every household. The prolific character actor died in his sleep Tuesday morning in Woodland Park, N.J., his daughter told the Associated Press .
