Southern actress Karthika Nair has rubbished rumours that her sister Thulasi is cast opposite veteran actor Vijaykanth's son in an upcoming Tamil film.

"Guys, the recent issue of Ananda Vikadan magazine said that Thulasi is acting with Vijaykanth sir's son is false, " Karthika said in her tweet.

It was reported that Thulasi has been roped in with Shanmuga Pandian, youngest son of veteran actor-turned-politician Vijaykanth.

Thulasi recently finished shooting for upcoming Tamil action "Yaan" alongside Jiiva, while Karthika is busy shooting for "Brindavana", Kannada remake of Telugu blockbuster "Brindavanam".

Thulasi and Karthika are daughters of yesteryear Tamil actress Radha Nair.