Soon after musical quintet Collabro were announced as the talent show's winners on Saturday night, David posted on Twitter that he was sad he would never see Simon again.
"Hi @SimonCowell shame I will never see you again," tweeted David. "Best of luck with everything. x".
David Walliams has been on the Britain's Got Talent judging panel since 2012
Fans have understandably been left confused as to whether David was suggesting he wouldn't be returning for the next series or if Simon has decided to focus on his other projects.
Collabro win Britain's Got Talent 2014
Father-of-one David, who is married to Dutch model Lara Stone, had previously joked that he thought his constant mockery of Simon would see him lose his job.
Hi @SimonCowell shame I will never see you again. Best of luck with everything. x
— David Walliams (@davidwalliams) June 7, 2014
"I am sure one day I will pick up the paper and find out I have been sacked," David told the Mirror. "But that day hasn't happened just yet.
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"It depends on how much I upset Simon in the live shows," he added. "There is no editing. If I am too naughty, maybe."
David joked that his constant mockery of Simon Cowell could see him lose his job
While the other Britain's Got Talent judges Amanda Holden and Alesha Dixon have remained silent on the issue of a new line-up, Simon previously hinted that change was in the air.
"I'm possibly looking at a shake-up for next year," he revealed. "It's about having a conversation to see how much they want to be on the show. Are they still into the idea of finding a star? I never want a judge for hire. I want someone committed."
Speaking specifically about David, the 54-year-old said "He goes too far at times. The more you say not to do something, the more he does it. He gets over-excited. He says and does things and sometimes regrets them, [but] I knew what I was getting when I hired him."