Few things are more amusing than celebrated stars looking back on their earlier performances and laughing about them.
My first ever [role] wasThronesand [my advice] would be, Dont be so bad!'
As for what she wishes she could tell herself, I would say, Dont be so insecure.

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You got the job, youre here, just own it.'
Relax, relate, release,Empires Taraji P. Henson, whose first gig was onSmart Guy, advised.
Emmy winner Jeffrey Tambor,Downton Abbeycreator Julian Fellowes, and Henry Winkler also offered some sage wisdom.

Watch the video above and see for yourself.