It is celebration time at the Congress headquarters in New Delhi as Congress party chief Sonia Gandhi [Images] won the Rae Bareli byelection by a huge margin on Thursday.

Sonia sought re-election upon quitting as member of  Parliament in March after the opposition accused her of violating the Constitution by being a lawmaker as well as holding an office of profit (head of the National Advisory Council).

Sonia will return to Parliament after Thursday's victory from Rae Bareli, her constituency in Uttar Pradesh. She won the seat by a margin of 4,17,888 votes.

Caption: Congress workers celebrating Sonia Gandhi's win outside the Congress headquarters in New Delhi.

Photograph: Dijeshwar Singh/ Saab Pictures