"I have a little confession to make about myself," Bill started.
"I wasn't actually born Bill. I was born something different. I was born actually…" He then trailed off.
The show cut to an ad break.
When the show returned, Bill revealed his "secret": "I was born actually David, but ever since I can remember I've been known as Bill." He added, "It's just a fun little fact about myself."
The camera then cut to Ali, who was relieved Bill was "not a woman - tick!"
She laughed and even appeared to catch herself out for her statement.
Many took to Twitter to express their anger and accused the program of transphobia.