Kim Sei-young catapulted herself into the Women's PGA Championship lead with a dazzling second round.
Kim used a birdie blitz to card a five-under-par 65 for a one-stroke lead at the major tournament in Pennsylvania on Friday.
The South Korean – a 10-time LPGA Tour champion but eyeing her first major – birdied five of the final six holes at Aronimink Golf Club.
"I was in a good momentum, so I just wanted to ride on that," Kim said.
"When we entered the front nine, the wind kind of slowed down and it was kind of easier to attack with my irons."
Kim tops the leaderboard at four under through 36 holes, ahead of Jennifer Kupcho (65), Anna Nordqvist (68), Danielle Kang (69) and Carlota Ciganda (69).
The likes of Lydia Ko (70) and co-overnight leader Kelly Tan (71) are two strokes off the pace, while Brittany Lincicome is a shot further back.
Defending champion Hannah Green managed to avoid the cut and qualify for the weekend thanks to her second-round 66, having opened with a 79.