It seems the glamorous mum-of-one was just as shocked as we were to hear Tom has now left TOWIE, prior to the show's Christmas special.
"Tom is leaving?" she asked. "I didn't have a clue."
Speaking exclusively to Reveal at the launch of her 'Signature Range' pushchairs for Mothercare, Billie told us she supported her co-star's decision.
She said: "Sometimes I think – especially with the boys – if it's not right for them anymore, rather than stay in the show and be unhappy, they want to move on. It's probably the best thing to do."
Prior to Tom's departure, Charlie Sims revealed he has taken a break from the show earlier this month.
While a spokesperson for TOWIE said Charlie had taken some time out to concentrate on his deli, a source told Reveal the reality star wanted to get away from the ongoing drama between his girlfriend Ferne McCann and sister Chloe Sims.
When asked if she thinks the show can put pressure on the cast's personal lives and relationships, Billie admitted that filming constantly for TOWIE can be a little "overwhelming" at times.
Although, she did admit it is less so for her, as she has purposely decided to keep her relationship away from the cameras.
"It can be overwhelming for some people," Billie claimed. "I can imagine having a relationship on the show must be really hard. You've got the added pressures of being on the screen. I'm fine, but for others, yeah, it must be hard."
And, while TOWIE's original castmembers have been known to call it a day over the years, the 24-year-old insists she is staying put.
She added: "I'm still really enjoying the show. Like I said, I'm in quite a good position on TOWIE. I don't really have a lot of pressures, so I'm loving it!"
Billie's comments come after Tom announced via Twitter that he has decided to leave the ITVBe reality series after two years.
Dismissing reports he had been "dropped" from the show, Tom tweeted: "I was not dropped from Xmas special, I quit to concentrate on my job."
His early departure means Tom will not be starring in this year's Christmas Special: The Only Way Is Essexmas.
One TOWIE fave who will be though, is Gemma Collins!
Fresh from the I'm A Celeb jungle, Gemma will be appearing in the Christmas Special - despite originally backing out as she was due to be in Australia. And, pal Billie tells us she is very happy to have her back.
"Gem belongs with TOWIE, it's her thing. I couldn't imagine it without her," she said. "I'm really looking forward to it. There's going to be lots of gossip and drama as usual!"
The Only Way Is Essexmas will air on Wednesday 10 December at 10pm on ITVBe.
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