Real estate mogul-turned-reality TV star Donald Trump is set to become a grandfather again - his daughter Ivanka is pregnant with her first child.

The socialite and businesswoman wed Jared Kushner in October 2009 and the couple has announced baby news. 

Taking to her Twitter.com blog on Friday, the 29 year old writes, "I have been wanting to share some amazing news with you all for some time... I'm pregnant! Jared and I couldn't be more excited."

Ivanka, Trump's daughter with first wife Ivana, is reportedly due to give birth this summer.

Trump already has two grandkids - Ivanka's brother, Donald Trump, Jr., has two sons with his wife Vanessa Haydon.

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