Steve Martin set to return in third instalment in the franchise, which sees offspring originally played by Kieran Culkin engaged to the son of a US Navy Seal

A new Father of the Bride movie will see Steve Martin's curmudgeonly dad planning the upcoming nuptials of his gay son, according to reports on nikkifinke.com.

Father of the Bride III is expected to see Martin return as businessman patriarch George Banks, with Diane Keaton as his wife, Nina. Its plot centres on the couple's son Matty, originally played by Kieran Culkin – who is unconfirmed for the new film – who reveals that he is to marry the son of a US Navy Seal.

Unable to process the news, the "thunderstruck and speechless" Banks is thrown out of the family home by Nina in the new storyline. Father of the Bride III will once again see original director and co-writer Charles Shyer taking charge of the cameras and working on the script.

The new film will be the first entirely original movie in the series. The original 1991 Father of the Bride was based on the 1950 film of the same name, while 1995's Father of the Bride II was loosely based on 1951's Father's Little Dividend, a sequel to the earlier movie.