Screenshot of the blockbuster "Kingsman: The Scret Service". [Photo/Agencies]

A sequel to the surprise blockbuster "Kingsman: The Secret Service" is in the works at Fox.

The blockbuster film directed by Matthew Vaughn and starring Colin Firth just topped $400 million at the global box office.

Samuel Jackson, Michael Caine and Taron Egerton co-starred in "Kingsman", which had a $80 million production budget.

Vaughn also co-wrote with screenplay with Jane Goldman and produced the film, which was based on the comic book "The Secret Service" written by Mark Millar and Dave Gibbons.

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