What is 'What if you're so cute' in French?

Et si tu es tellement mignon is a French equivalent of 'What if you're so cute'. The conjunction 'et' means 'and'. The conjunction 'si' means 'if'. The personal pronoun 'tu' means '[informal] you'. The verb 'es' means '[you] are'. The adverb 'tellement' means 'so'. The masculine adjective 'mignon' means 'cute'. All together, they're pronounced 'eh see tyoo eh tehl-maw mee-nyoh'.

That's what's said to a 'cute' boy. To a 'cute' girl, it's 'Et si tu es tellement mignonne'. It's pronounced 'eh see tyoo eh tehl-maw mee-nyuhn'.