Canberra have signed rising American star Simone Charley for the upcoming W-League season, adding further depth to the club's attack.

The 24-year-old forward joins Canberra on a one-season loan agreement from the Portland Thorns, who reached the semi-finals in the National Women's Soccer League this year.

"I'm super excited to be with Canberra United, just to have this wonderful opportunity to play soccer in a whole new atmosphere is really exciting," Charley said.

"The NWSL gave me the opportunity to learn a lot from some of the best players in the world.

"Just the knowledge and experience I've gained from there is something I believe I can build off."

The American forward is one of five international players set to wear lime green this summer, joining Katie Stengel and Elise Thorsnes in the frontline.

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Charley developed through the American college system and attended the University of Vanderbilt, finishing with 25 goals and 18 assists across her 76-game career.

She made her NWSL debut for Portland earlier this year and went on to make six starts in 11 matches.

Canberra coach Heather Garriock says the American will provide a further boost to their striking squad and the club looks to become a top-four challenger this year.

"I'm absolutely delighted that Simone has signed with Canberra United this season," Garriock said.

"She joins us from one of the biggest clubs in the NWSL, she's incredibly quick up top and she'll be a huge threat alongside our other players in attack."

The club are expected to announce their third full contract for an international player later this week, with Thorsnes signing as a guest player.