The move represents a major coup for Chelsea and their manager Sonia Bompastor. Malard is understood to have been a key target for Chelsea and they have tracked the former Lyon player for an extended period. The 26-year-old has previously played under the Chelsea boss Bompastor at Lyon and is understood to be looking forward to reuniting with the Frenchwoman.
The two have a friendship that has lasted for more than a decade, since the coach encouraged her to swap the island of Reunion for Lyon as a youngster.
For Chelsea, the move for Malard will strengthen their attacking options in a summer when they have also agreed a new contract for the England forward Aggie Beever-Jones.