"Happy children's day tweeple... today is not only my dad's birthday too but I can actually celebrate day for the two in my tummy too lol (sic)," Celina posted on twitter.

The 29-year-old actress posted a picture of her photo shoot for 'Jashn'.

"My first shoot with the twins in my tummy lol...(sic)," she said.

Tweeting to filmmaker Pritish Nandy, the actress said, "Thank you my lord hugs and more muahs... From the twins too (sic)."

On October 18, Celina, who is married to Dubai-based hotelier Peter Haag, had announced her pregnancy news on Twitter.

"Dear friends Peter and myself seek your blessings on this new journey which we now begin. We are exhilarated and very happy with the news. As for myself its a fabulous new aspect to embracing my womanhood. I feel complete!!," she had tweeted.

Celina married Peter on July 23 at a thousand year old monastery in Austria.