Lena Headey as Cersei Lannister in Game of Thrones
January 5, 2015 5:12 PM EST

Game of Thrones‘ upcoming flashbacks just got a little more real.

The producers of the hit HBO show confirmed last October that the fifth season of the show would break its longstanding no-flashbacks rule, and now a younger version of the Cersei Lannister has been cast.

Nell Williams will play the kid version of the grown-up character played by Lena Headey, according to Williams’ resume on her talent agency’s website, Watchers on the Wall reports.

Williams previously starred in the television series The Revolting World of Stanley Brown and the television movie Loving Miss Hatto.

Write to Nolan Feeney at nolan.feeney@time.com.

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