"Jennifer was shocked, but at the same time she was ecstatic with the news. It wasn't planned... but now that it's happened Jennifer and Ross are both very happy," the source had said.
However, Love Hewitt's rep tells the New York Post that the reports don't hold a shred of truth.
"It's not true. Jennifer is not pregnant," the paper quoted the rep, as saying.
The actress was in the news recently for hitting out at papers that ridiculed her for putting on weight when she appeared in a bikini.
At the time the 'Ghost Whisperer' star wrote on her personal website: "Size two is not fat! Nor will it ever be. And being a size zero doesn't make you beautiful."