The 46-year old actor had completed filming for the next instalment, Mockingjay: Part 1, and had 'only seven days remaining to shoot' on Part 2, according to industry insider The Hollywood Reporter.
Hoffman's minor character takes a more prominent part in the final two episodes as Heavensbee becomes a commander of District 13's rebel forces.
The films’ scheduled November 2014 and 2015 release dates are believed to be unaffected by Hoffman’s death, but some rewriting will be required.
Philip Seymour Hoffman: A magnificent and versatile screen actor whether in the lead or as a memorable cameo
An official statement from director Francis Lawrence, author Suzanne Collins, lead star Jennifer Lawrence and producers Nina Jacobson and Jon Kilik said: “Words cannot convey the devastating loss we are all feeling right now. Philip was a wonderful person and an exceptional talent, and our hearts are breaking. Our deepest thoughts and condolences go out to his family.”
Hoffman’s co-stars past and present have been sending their condolences. "This is a horrible day for those who worked with Philip. He was a giant talent. Out hearts are open for his family," said Tom Hanks, who starred alongside him in Charlie Wilson's War.
Other celebrities took to Twitter to post message of sadness at the news.
Oh no, I’ve just heard the news of the death of Philip Seymour Hoffman. What a blow to the industry & most of all of course to his family…— Stephen Fry (@stephenfry) February 2, 2014
Such shocking & sad news. RIP Philip Seymour Hoffman. One of the greatest actors of a generation and a sweet, funny & humble man.— Ricky Gervais (@rickygervais) February 2, 2014
OH NO!!!!! Philip Seymour Hoffman has died. A truly kind, wonderful man and one of our greatest actors - ever— mia farrow (@MiaFarrow) February 2, 2014
Lionsgate Films, the production company behind The Hunger Games, released a statement paying tribute to a “singular talent and one of the most gifted actors of our generation”. “We’re very fortunate that he graced our Hunger Games family,” it read.
Unfortunately, The Hunger Games is not the only project facing an uncertain future following Hoffman's untimely death.
The actor, who won an Academy Award for his role as writer Truman Capote in 2005's Capote, had been cast in the lead for a new Showtime comedy series called Happyish.
Hoffman had also finished work on another two films, God's Pocket and A Most Wanted Man, both of which will be released posthumously.