。
She looks as beautiful as an actress.
Literal
[topic-は] just-like actress [genitive-の][as-ように] beautifully appears.
美しく is the adverbial form of 美しい ('beautiful'), used here to modify 見える ('appear'). The combination 美しく見える gives 'appears beautiful' — a stative observation. Compare 美しい ('is beautiful' as direct attribution) vs 美しく見える ('appears/looks beautiful, in observable form'). 女優 ('actress') is the standard term for a female actor, though contemporary usage trends toward the gender-neutral 俳優 (or キャスト) — younger speakers may avoid 女優 as gendered.