In scenes to be broadcast in early April, the couple prepare to tie the knot in front of friends and neighbours, with Kat and Alfie Moon, Pat Evans, Ronnie Branning and Roxy Mitchell among the guests on the day.
Ian Beale, meanwhile, is expected to take on the role of Greg's best man.
Builder Greg - played by Stefan Booth - was first introduced to EastEnders late last year as he spent time refurbishing the Queen Vic following the dramatic blaze at the pub. However, his involvement in Tanya's life had been mentioned months earlier.
More recently, Tanya has moved back to Albert Square with Greg in order to be closer to daughters Lauren and Abi.
Last December, Booth told DS that he hoped Tanya and Greg could "sustain a very healthy and long-term relationship".
However, whether or not the couple make it down the aisle has yet to be confirmed.
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