WBBL10 Challenger, Brisbane
Sydney Thunder 133-7 (20 overs): Darlington 40* (29), Parsons 3-10
Brisbane Heat 134-1 (20 overs): Redmayne 53* (41), Bates 1-25
Brisbane Heat won by nine wickets
Brisbane Heat will face Melbourne Renegades in the final of the Women's Big Bash League after a nine-wicket win over Sydney Thunder in the Eliminator.
Chasing 134 from their 20 overs, the Heat, inspired by Georgia Redmayne and Jemimah Rodrigues, secured victory with 29 balls to spare.
Redmayne finished 53 not out, hitting a four off the final ball of the innings to clinch victory. Rodrigues scored 43 off 30 balls before retiring hurt with a sprained left wrist.
The final takes place on Sunday (02:20 BST) at Melbourne Cricket Ground.
The Thunder had been in trouble for large parts of their opening innings, reduced to 69-7 in the 14th over as Grace Parsons claimed figures of 3-10 from her three overs.
An unbeaten 64-run partnership from Hannah Darlington (40 not out) and Taneale Peschel (24 not out) off the final 37 balls took the Thunder to 133-7.
In response, the Heat suffered an early setback when opener Grace Harris was stumped on seven.
Wicketkeeper Redmayne was joined in the middle by Rodrigues, batting despite picking up an injury while fielding.
Rodrigues survived dropped catches on zero, 25 and 30 to put on a 77-run partnership with Redmayne before retiring hurt.
Charli Knott's 19 not out off 16 balls, alongside top-scorer Redmayne, took the Heat to victory on their home ground.
"Unreal. I think I'm a bit lost for words at the moment," player of the match Parsons told ABC. "Something you dream of as a kid.
"To get the opportunity to play in a final is pretty special."
The Renegades are looking for their first WBBL title this season, having finished top of the league table.
Eliminator winners Heat are chasing their third WBBL crown, which would make them the first team to win the competition three times since its inception.