WATCH: Morgan Scores 100th Goal, Pugh Nets Brace in USA's Thrilling Win vs. Australia

Alex Morgan scored her 100th USWNT goal, Mallory Pugh got the winner and scored a filthy chip to finish off the game as the USWNT beat Australia in an enthralling back-and-forth affair.

The USWNT won a thrilling back-and-forth game against Australia on Thursday, as Mallory Pugh scored the eventual game-winner seconds after coming on and Alex Morgan recorded her 100th international goal in the team's 5-3 win.

Morgan hit the milestone early, setting the tone for what would wind up being a goal-filled game with a lovely individual effort from the top of the box to give the USA the early lead.

Just your causal 100th international goal, no biggie! Alex Morgan puts the USWNT ahead! pic.twitter.com/WuoAHb9X2z (via @FOXSoccer)

— SI Soccer (@si_soccer) April 5, 2019

The lead didn't last long, with Lisa De Vanna pulling Australia even 15 minutes later.

While the first half was reasonably even, things weren't looking good for the USWNT at the beginning of the second half. 

The USA conceded a goal within the first two minutes, with Caitlin Foord scoring to give Australia a 2-1 lead. That might have been just what the USWNT needed to wake up, though.

That didn't take long. USWNT get off to a poor start in the second half and Caitlin Foord makes them pay (via @FOXSoccer) pic.twitter.com/Ez8pB1YwtZ

— SI Soccer (@si_soccer) April 5, 2019

It didn't take long for Tobin Heath to respond, as she smashed in a header in the 53rd minute to bring her team level and resurrect the USWNT's attack. 

Tobin to the rescue! Heath buries a header to bring the USWNT level (via @FOXSoccer) pic.twitter.com/1IsRa4zhR5

— SI Soccer (@si_soccer) April 5, 2019

Megan Rapinoe, making her 150th appearance for the U.S., was next to write her name on the scoresheet, lashing one into the corner to complete the USA's comeback and take back the lead. 

Megan Rapinoe with the stunner! (via @FOXSoccer) pic.twitter.com/GiUUTI4Csh

— SI Soccer (@si_soccer) April 5, 2019

Shortly after she pulled up and appeared to grab her leg before being subbed off, with young star Pugh coming on to replace her. And it didn't take her long to make her mark on the game, scoring with her second touch to give the U.S. a two-goal lead and then scored a fantastic chip to cap the game off–sandwiching a super header from Sam Kerr that had given Australia a brief lifeline in the final 10 minutes of the match. 

Pugh Pugh Pugh🎯Mallory tacks on another one to put the USWNT up 2 (via @FOXSoccer) pic.twitter.com/3cenVHS6WK

— SI Soccer (@si_soccer) April 5, 2019

Mal Pugh with the FILTHY chip to finish Australia off (via @FOXSoccer) pic.twitter.com/8EG24b9jNv

— SI Soccer (@si_soccer) April 5, 2019

The USWNT's next game is Sunday against Belgium at LAFC's Banc of California Stadium, the final friendly before a three-match send-off series that leads into the 2019 Women's World Cup in France.