Super Junior Siwon can't be proud enough to show off his pretty sister Jiwon by uploading their selca on his twitter.

Although no caption, Siwon is here to introduce to his more than 4 million followers his beautiful younger sister Jiwon. The good-looking siblings took the selca inside a car and give V-signs.

Fans and non-fans commented, "You two look so much alike!","Oppa's sister is so pretty!","Jiwon unnie you're very beautiful like oppa!", "Good-looking genes run through their blood," and so on.

Her sister look very prim and demure, doesn't she?