Tennis superstar Roger Federer is a dad - his wife Miroslava 'Mirka' Vavrinec has given birth to twins.

The current tennis world number one and Vavrinec, a former tennis player, welcomed baby daughters Charlene Riva and Myla Rose on Thursday in Switzerland.

Federer announced the happy news on his official website, writing, "This is the greatest day of our lives. Mirka, Myla and Charlene are all healthy and doing very well."

The new parents - who married in April - have been dating since the 2000 Sydney Olympics, where they both represented Switzerland.

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(This news article provided by World Entertainment News Network)