Kate Winslet will star on the next series of 'Who Do You Think You Are?'

Kate Winslet

Kate Winslet

The 43-year-old Academy Award winner - who took the prize for Best Actress for 2009's 'The Reader' - is said to be in the UK filming her episode already, as she explores the secrets of her family's history for the 16th series of the popular BBC One show.

An insider told The Sun newspaper's Bizarre TV column: "Getting a bona fide film star to take part in 'Who Do You Think You Are?' is a real coup for the makers of the show.

"There's only been a handful of participants on a similar level, such as Sir Ian McKellen and JK Rowling, and she's likely to top the bill of names in the new series.

"The programme continues to be one of the most popular shows on the Beeb and signing up genuine stars is proof of its ongoing appeal."

The episode is likely to delve into her maternal grandfather, who got divorced and remarried - which was a huge scandal at the time in 1938.

He also married a woman 17 years younger while another of Kate's relative, Robert Bridges, married his own cousin - nine years his junior - in 1851.

It was recently revealed the 'Titanic' actress has signed on to voice the titular character in the latest adaptation of classic equine novel 'Black Beauty', which was written by Anna Sewell in 1877.

Kate will be providing the voice of the titular horse, while 18-year-old Mackenzie Foy - who is best known for her work as Renesmee Cullen in 'The Twilight Saga', and as Clara in Disney's 'The Nutcracker and the Four Realms' - will star as the lead.