The 74-year-old actress played Peggy Mitchell - the rambunctious owner of the Queen Vic - for 16 years, leaving the programme almost two years ago.
[L: Barbara Windsor with husband Scott Mitchell, R: in character as Peggy]
Appearing on an upcoming episode of The Rob Brydon Show, the comedian asked Windsor whether she would ever consider returning to Albert Square, to which she replied: "Never say never."
Windsor joined the soap full-time in 1994, and was presented with the Lifetime Achievement Award at the British Soap Awards in 2010.
The former Carry On star has already returned to the soap once, after a debilitating case of the Epstein-Barr virus forced her to take a two-year sabbatical in 2003.
Windsor departed the soap again in 2010, as Peggy left Walford after her son Phil - who was addicted to crack cocaine at the time - burnt down the Queen Vic in an act of revenge.
Watch a classic clip of Barbara Windsor as Peggy Mitchell below: