Jenna joined Doctor Who in 2012 and been the companion to two Doctors – Matt Smith and Peter Capaldi.
Meanwhile, the Daily Mirror reports that her first role post-Doctor Who will be playing Queen Victoria in an ITV drama series.
Jenna, 29, first came to public attention as Jasmine Thomas in Emmerdale in 2005, and is expected to play the Queen from the age of 18, although ITV said it was not making ‘any announcements about casting presently’.
ITV announced in May they would be making an eight-part series about the life of Queen Victoria.
Filming starts on the Queen Victoria drama later this month and it’s thought that Jenna has already filmed her final scenes for Doctor Who.
The BBC has declined to confirm Jenna’s departure from Doctor Who.
Earlier this week, Jenna told Radio Times: “You’re in Doctor Who knowing it will never last… It’s constantly regenerating, so you want to make your time count and enjoy the adventure for the fleeting time you’re here.”