Boris Johnson has described the death of Caroline Flack as a “tragedy”.
A Number 10 spokesman said: “Caroline’s death was a tragedy and our thoughts are with her family and friends at this very difficult time.”
The TV presenter was found dead at the age of 40 at her home in Stoke Newington on Saturday after taking her own life.
She was set to stand trial for the alleged assault of her boyfriend, Lewis Burton, next month.
Flack stepped down from presenting the current winter series of Love Island after the alleged assault.
According to her management company, Flack had been "under huge pressure" since she was accused of assaulting Burton.
She had denied the charge and was due to stand trial next month.
Flack’s management company has criticised the Crown Prosecution Service (CPS) for pressing ahead with what it called her "show trial" even after Burton said he did not support it.
Lawyers have said that the CPS may have pressed ahead with assault charges against Flack due to high public concern around domestic violence.
Meanwhile, Burton has spoken out after her death to say that his “heart is broken” and that “we had something so special”.
"I am so lost for words I am in so much pain I miss you so much I know you felt safe with me you always said I don’t think about anything else when I am with you and I was not allowed to be there this time I kept asking and asking," he said.
