役は

as for the role

→ 役
phrase Uncommon #18,749
as for the role 役 means “role” or “part,” especially an acting role. は marks it as the topic; the exact translation depends on the rest of the sentence.
JA: 私の役は王様です。
EN: My role is the king.

何だこの役は

What kind of role is this?

— ベルリン・天使の詩 (1987)

残念ながら君の演じる役は演劇冒頭殺されるのだ

Unfortunately, the character you play is killed at the beginning of the play.

女王の役は彼女に似合わない

The role of a queen doesn't suit her.

まあ貴方の役は大きい!

Well, you have a major role to play!

— ラスト、コーション (2007)

その役はお気に入り

Is that your favorite role?

— 帰ってきたヒトラー (2015)

彼女の役は

What is her role?

— 8 1/2 (1963)

そう君の役はないんだ

That's right—you don't have a role.

— 8 1/2 (1963)

私の役は

What’s my role?

— 8 1/2 (1963)

僕の演じる役はの木だけが無いとほぼ同じです

The role I play is just a single tree, so it’s almost the same as having no role at all.

私の役は

What’s my role?

— 8 1/2 (1963)