Caroline Lucas  has said that if one or more Green MPs is elected on 6th May, more would "swiftly follow" at future elections.
Speaking on BBC1's Andrew Marr Show this morning  she talked of a "real possibility" the Greens would get their first MP in Westminster come the general election.
It comes amidst increasing speculation that the election of a Green under the First Past the Post system could be a possibility following success under proportional representation in the European Elections.
A poll in December by ICM put the Greens in first place  in the constituency of Brighton Pavillion.
They are also hoping to make inroads in Lewisham and Norwich South.
A poll two days ago in Norwich South suggested the Greens were making significant gains on the 2005 result .
In Lewisham, Darren Johnson was the first Green to be elected to Lewisham Council, in 2002. In the 2006 elections, a further five councillors were elected, taking the total to six - the largest Green group on any council in London, and one of the highest Green votes overall in the whole of the UK.
There are over 300 Green Party candidates standing at the election.