The star is a huge fan of the HBO series and even made a massive $120,000 bid for a private screening with Clarke who plays Daenerys Targaryen.
Pitt was in great spirits at the event laughing throughout at the the Sean Penn's JP HRO Gala in Los Angeles on Saturday.
The Fight Club star has been piecing his life together since his blockbuster split with Jolie, 42.
Meanwhile Angelina Jolie Looked chic as she attended the Golden Globe Foreign-Language Nominees Series 2018 Symposium in Los Angeles.
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