The pair have grown close over the past few months and will take their friendship to the next level, the Daily Star Sunday reports.
Ian (Adam Woodyatt) could even become soap's most married man if Denise (Diane Parish) goes on to be his fifth wife.
She previously turned him down when Jane left him and struggles to come to terms with the fact that she has romantic feelings for him.
The new couple decide to keep their relationship a secret from friends and family.
An EastEnders insider said: "Denise has always had a bit of a soft spot for Ian but he can be infuriating, so whether they go the distance in the next few months remains to be seen."