Travis Head, the Australia limited-overs batsman, will return to Headingley this summer as Yorkshire's overseas player for the NatWest T20 Blast.
Head, 23, played four times for the club in last season's competition, scoring 113 runs at a strike rate of 134.52 before being called up for Australia's ODI series in Sri Lanka.
He has played 29 matches for Australia in white-ball cricket since January 2016, and has earned a reputation with Adelaide Strikers in the Big Bash League as one of the most explosive batsmen in T20 cricket.
"I am looking forward to returning to Headingley to play for the Yorkshire Vikings in 2017," said Head. "I really enjoyed my time in Yorkshire last year and I can't wait to meet up with the lads again.
"As an overseas player, I would like to help the team go further than last year and hopefully win the NatWest T20 Blast."
Martyn Moxon, Yorkshire's director of cricket, confirmed the signing during the club's Annual General Meeting at Headingley.
"When Travis came over last year, although his stay was relatively brief, he showed his capabilities in that short period. He has gone from strength to strength since then, so it an easy decision to bring him back.
"Travis is now an established international cricketer and we are really looking forward to having him on board. Together with Peter Handscomb, I believe that we have two outstanding overseas players.
"We have all bases covered now, so it is something to look forward to."
Andrew Gale, the first XI coach, added: "It was a no-brainer to bring Travis back. If we had the opportunity to bring him back, we were always going to. He has gone from strength-to-strength since he left us last summer, getting into the Australia team and being a consistent performer for them.
"We have been looking at someone to make a big impact and Travis did that for us last year. He is a fantastic player around the dressing room and a fantastic one on the pitch.
"That middle order batting position has been key for us in T20 over the last few years, getting someone who is explosive and can win you a game. Travis did that for us last year and given his availability, we were always going to try and sign him again."