June Brown, who played Dot Cotton in EastEnders, paid tribute to Wendy Richard: "I loved working with her. We were good partners. She was a very kind woman."
EastEnders' Mitchell clan was represented at the funeral by Barbara Windsor and Steve McFadden.
Patsy Palmer was among ex-EastEnders actors reuniting for the funeral.
Anna Wing played EastEnders' Lou Beale, the mother of Wendy Richard's character Pauline Fowler.
Frank Thornton starred in Are You Being Served? Wendy Richard played cheeky shop assistant Miss Brahms in the series.
Friends from across the showbiz community, including Anita Dobson and Brian May, sent flowers to the ceremony.
Paul O'Grady was among those paying tribute.
Pam St Clement played Pat Butcher in EastEnders, in which Richard featured in over 1,400 episodes.
Actress Lorraine Chase joined mourners at St Marylebone Parish Church in central London.
Filming on EastEnders was scaled down to allow cast members like Lacey Turner, Perry Fenwick and Charlie Clements to attend the funeral.
Todd Carty, who played the son of Wendy Richard's character in EastEnders, acted as a pallbearer at the funeral.