The former Corrie actress, who played Hilda between 1964 and 1987 died in hospital on Friday.
Her niece Sonia Hearld, 64, announced that she died peacefully after been admitted to hospital on Tuesday morning.
“There was nothing telling us anything was wrong – she was just generally weak and under the weather” she said.
People have been taking to Twitter to share their sadness at her death.
Take a look:
One of the greatest soap lines ever written. RIP Jean Alexander (11 October 1926 – 14 October 2016) pic.twitter.com/3fUEYpJToB
— Dan The Man (@Dannythemann90) October 15, 2016
Ta-ra Chuck. I adored #HildaOgden in Corrie. RIP Jean. Coronation Street star Jean Alexander dies aged 90 – BBC News https://t.co/OhpEF8LSUc
— Rory Cowan (@1rorycowan) October 15, 2016
Jean Alexander will always be Coronation Street's most iconic actress. Hilda and Stan Ogden are now reunited xxx #RIP #JeanAlexander pic.twitter.com/1ZyuxV56wc
— Scott Nelson (@SocialistVoice) October 14, 2016
RIP Jean Alexander. A true soap Icon. Never will you be forgotten. pic.twitter.com/KrPzGVAy1X
— Kym Marsh (@msm4rsh) October 15, 2016
Acting is a craft, we're not artists or stars or idols, we're craftsmen & craftswomen. Jean Alexander was one of the best. Well done. RIP
— Eddie Marsan (@eddiemarsan) October 15, 2016
Jean Alexander RIP, Good Nigel God Bless Hilda. She was a class act.
— Peter Reid (@reid6peter) October 15, 2016
