Australia's Nick Kyrgios will return to Queen's Club for the third time in June after being confirmed in a strong line-up for the 2017 Aegon Championships.
The 21-year-old, ranked 16th, joins Andy Murray, Rafael Nadal, Milos Raonic, Stan Wawrinka and Grigor Dimitrov in the singles draw.
Kyrgios - yet to win a match in two previous appearances at Queen's - has beaten Novak Djokovic twice in 2017.
"I don't think British people have seen the best of me yet," said Kyrgios.
He made his breakthrough with a stunning win over Nadal on his way to the Wimbledon quarter-finals in 2014, and reached the last 16 for the last two years, losing to eventual champion Murray in 2016.
"I was very young when I had that run at Wimbledon [in 2014]," he added.
"Mentally I have improved a lot recently, I'm in a great place at the moment, I feel like I've matured and that's helping me. I'm playing better tennis, I'm getting some better results."
Britain's Jamie Murray has committed to competing in the doubles at this year's Aegon Championships, which will run from 19-25 June.
In January, Andy Murray committed to the championships for the rest of his career and the BBC announced it will cover the event until at least 2024.