Priyanka Chopra has bid her 'Quantico' alter-ego Alex Parrish an emotional goodbye.

The 36-year-old actress has paid tribute to the FBI agent she has portrayed since the US programme hit screens in 2015, after the series finale aired on ABC in the US on Friday night (03.08.18).

The 'Baywatch' star admitted the job ''challenged'' her ''psychically'' and ''emotionally'', but that she hopes it has lead the way for other women of colour to become ''leading ladies'' in Hollywood.

Alongside a picture of a billboard promoting the last season, Priyanka wrote on Instagram: ''As the series ends, I am saying goodbye to Alex Parrish. As you'll see, her story will come full circle...and that is the best feeling as an actor. Bringing Alex to life has challenged me physically and emotionally, but even more significant it has (I hope) cracked the door open for female talent and women of color to play leading ladies. Thank you for opening your homes and hearts to me every week! Thank you to the cast and crew of #Quantico for being such an amazing team to work with, for all the memories that I will cherish...memories of laughter, of learning new things, of making friends for life. It was a pleasure working with each and every one of you, and I look forward to crossing paths again! Thank you @joshsafran @abcnetwork @mseitzman @disney and everyone who worked on the show [sic]''

Quantico was axed by ABC after three series in May.

Meanwhile, it looks set to be a busy year for Priyanka as she's just got engaged to her boyfriend Nick Jonas and will seemingly be planning their wedding in 2019.

The 25-year-old hunk got down on one knee during a romantic trip to London.

Prior to their trip to the British capital, Nick reportedly closed down a Tiffany's store in New York City in order to find the perfect ring to propose with.

A source said: ''They are very happy. His friends and family have never seen him like this, and they're all really excited for him. He's definitely very serious about her.''