The pair, who appeared together at the battle stages earlier this year, were snapped this week working together once again.
Leah said about her mentor: "I have so much to thank this man for – always believing in me, always fighting for me, always giving me incredible opportunities."
She added: "Will is always making me laugh when I should be nervous and always teaching me." 24
Since the series ended last year Leah has continued to work closely with coach Will, flying out to America to record tracks for a debut album out this year.
Leah has also been supporting Will on his concert tour at venues including the O2 Arena, singing alongside Will and Cheryl Cole.
But so far it's all been rather quiet on exactly when Leah's album will see the light of day, if ever.
And that's despite Will previously claiming that the show's stars needed to rush to get their music out.
He said last year: “You have a whole bunch of singers and one wins. Then directly after they win, I don’t know what happens. The label and everything engaged and surrounded the winner, and made sure they had all of the material.
“I don’t think the rushing happens. And if it did happen, it’s happened too slow. Especially in this day and age when everything changes every 20 seconds on Twitter. I hope we can learn from that.”
Leah released a promo video called No Ordinary Love last month but it was a met with a rather lukewarm reception.
"I waited a year for this...and it's terrible," one reviewer wrote.
Others took aim at Will, writing online: "An extraordinary talent, being mismanaged. This song isn't her at all. "
Are you looking forward to finally (hopefully) hearing Leah's album? Add your comments!
See what last year's other Voice finalists are up to below...