The signings come off the back of a successful season for the Sydney FC duo who are gearing up for the 2018-19 W-League Grand Final this weekend.

While this is not Chloe Logarzo's first US rodeo - having played for USL team Colorado Pride in 2014 - it will be the first NWSL season that either player will take part in.

The NWSL is widely regarded as one of the best women's leagues in the world, with the likes of international superstars Alex Morgan, Marta, Lindsay Horan, and Sam Kerr all plying their trade there.

For Harrison, the move is extra special.

Not only has the converted left-back only recently returned to football after rupturing her ACL, but she has also never played for a club outside of Australia before.

Meanwhile, despite appearances for Eskilstuna United in Sweden and Avaldsnes in Norway, Logarzo's big break on the international scene came after a strong performance at the 2018 Tournament of Nations, where she scored the Matildas' only goal in a 1-1 draw with the United States.

For many fans, it was only a matter of time before Logarzo was snapped up by a big club overseas.

The pair will be joined at Washington Spirit by their Sydney FC team-mate, goalkeeper Aubrey Bledsoe, who tweeted her joy at the news earlier this morning.

After a disappointing 2018 season, Washington Spirit are looking to rebuild under new head coach Richie Burke, with the current squad featuring young USWNT stars Mallory Pugh, Rose Lavelle, and Andi Sullivan.

The team also features a number of players who have made appearances in the W-League over the last few seasons including Tori Huster, Ashley Hatch, Francisca Ordega, and Taylor Smith.

The move comes at an important time for Logarzo and Harrison as they prepare to secure their spots in the Matildas squad for the 2019 Women's World Cup in June.