01of 09
Brian Cox
Shutterstock; Peter Kramer/HBO

02of 09
Jeremy Strong
Magnolia Pictures/Everett; Graeme Hunter/HBO

03of 09
Kieran Culkin
Twentieth Century Fox; Macall B. Polay/HBO

04of 09
Sarah Snook
Pericles Film Productions/Everett; Peter Kramer/HBO

In 2018, Snook hid her real-life Aussie accent and became Shiv Roy, the youngest Roy sibling and only sister of the bunch. Though viewers initially saw her reject her family’s questionable values, Snook’s character eventually proved that she’s no more angelic than (and equally as entertaining as) the rest of the Roys.
05of 09
Matthew MacFadyen
PBS; Graeme Hunter/HBO

06of 09
Alan Ruck
Universal; Macall B. Polay/HBO

Three years later, Ruck nabbed a more prominent role inFerris Bueller’s Day Offas the titular schemer’s neurotic best friend, Cameron Frye.
07of 09
Nicholas Braun
Showtime Network/Everett; Macall B. Polay/HBO

Braun started out in the entertainment industry as a child star: in the 2001 dramaWalter and Henry, he played the younger half of a grandfather-grandson musical duo fallen on rough times in New York City.
08of 09
Justine Lupe
CBS/Getty; Graeme Hunter/HBO

09of 09
J. Smith-Cameron
Everett; Macall Polay/HBO

source: people.com