"I have no hesitation in accepting my relationship with Amrita Rai. She and her husband have already filed a mutual consent divorce case," Mr Singh, 67, tweeted.
Mr Singh's wife, a cancer patient, died last year.
I have no hesitation in accepting my relationship with Amrita Rai. She and her husband have already filed a mutual consent divorce case.- digvijaya singh (@digvijaya_28) April 30, 2014
Once that is decided we would formalise it. But I do condemn encroachment in our private life.- digvijaya singh (@digvijaya_28) April 30, 2014
Pictures of him with Ms Rai have been posted recently on social media. She said on twitter today that she plans to marry the Congressman.
At 4 pm today, three of the top 10 trending topics on Twitter in India were on Mr Singh or Ms Rai.
I have separated from my husband and we have filed a mutual consent divorce papers. After which I have decided to marry with Digvijaya Singh- amrita rai (@amrritarai) April 30, 2014
In this election campaign, Mr Singh was among senior Congress leaders who attacked Narendra Modi, the BJP's prime ministerial candidate, after he for the first time publicly acknowledged that he is married. (In poll affidavit, Modi says Jashodaben is his wife)
The Congress, which is expected to be dealt a crushing defeat by the BJP after 10 years in power, seized the issue, alleging that Mr Modi's refusal to acknowledge his wife for decades reflects a poor attitude towards women.