• Florence Pugh received an Oscar nomination for best supporting actress for her role as Amy March in "Little Women."
• Her older brother is HBO's "Game of Thrones" actor Toby Sebastian.
• He congratulated her on Tuesday for her nomination with a photo and heartfelt message on Instagram.
• "You have worked your arse off and you've been exquisite in every single one of your performances. Proud doesn't cover it," Sebastian wrote.
• The actress left a comment that said, "Love you big time Tobias. Kisses over to you for all your big brother love. Tennis when I get back.."
• Many fans didn't realize that the actors were related and expressed their shock on Twitter.
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Toby Sebastian couldn't help but applaud his younger sister Florence Pugh on Tuesday following her first Academy Award nomination. 

The 27-year-old actor, who played Trystane Martell of House Martell in HBO's "Game of Thrones," shared a photo of himself hugging Pugh, whose role as Amy March in "Little Women" scored her an Oscar nomination for best supporting actress. 

"Today my friends, she's been nominated for an Oscar. Yes, an OSCAR. You have worked your arse off and you've been exquisite in every single one of your performances. Proud doesn't cover it," he wrote. 

The 24-year-old actress left a comment that said, "Love you big time Tobias. Kisses over to you for all your big brother love. Tennis when I get back.."

Although both Pugh and Sebastian had sizable roles in "Little Women" and "Game of Thrones," respectively, many fans didn't realize that the two were related — likely due to the fact that they have different last names. 

Some people were less concerned with the connection between the two stars and instead focused on Pugh's "hot brother."

Sebastian and Pugh were both born in the UK and spent a portion of their childhood in Spain with their two other siblings, actress Arabella Gibbin and Rafaela Pugh. They've consistently supported each other as their careers began to catch steam.

The actors attended the 2015 London Film Critics' Circle together following Pugh's 2014 film debut in the movie "The Falling." Pugh's costar Maisie Williams also played Arya Stark in "Game of Thrones" alongside Sebastian.

In 2019, he joined his other siblings in Paris to accompany Pugh while promoting "Little Women." 

Pugh has also done her part to promote her brother's work. She suggested her followers watch her brother play Andrea Bocelli in the 2017 biographical film "The Music of Silence" and more recently shared his music. 

Despite the actress's whirlwind season of nominations, Pugh and Sebastian have seemingly maintained a goofy, lighthearted sibling relationship.

"Clutch your bro and the tequila, everything else will sort itself out," the actress wrote in June 2019. 

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