The glamour model gave fans a glimpse of what's in store for them in a behind-the-scenes shot.
Rhian, 32, put her assets on display in the saucy get-up as she took a phone selfie in the mirror.
The Page 3 icon posed seductively in the red and black lacy underwear that displayed her famous hourglass curves in full glory.
The flattering bra accentuated her famous breasts and the corseted panties showed off her teeny waist.
She captioned the pic "Look in the mirror baby
"#BTS from today's shoot (Yep I just quoted a Simply Red song.)"
And Rhian's 280k Instagram followers were quick to show their appreciation for the pic.
Many gushed over how "gorgeous" and "stunning" she looked.
But fans will have to make do with seeing the stunner covered up from now on.
Last month the recently-married model vowed that she bared her boobs for the last time now that she's got hitched.
She dropped the bombshell that after 12 years of getting her kit off — with her debut in The Sun in 2006 — she will make a final topless appearance in her 2019 calendar.
The 32-year-old is adamant she will now only go topless around new husband, former Corrie actor Oliver Mellor, 37, who she married in Turkey in September.
Disappointing millions of fans, she told The Sun on Sunday: “It’s going to be my last topless calendar.
"Now I’m married, I don’t enjoy topless modelling any more.
“It’s not like Oliver is bothered by me doing it but I think it’s a sign of respect to him. They are his now!
“I always thought that when I got married it would be my last one.
“There’s nothing wrong with it but I’m busy with other stuff. I needed to put a cap on it.”
Manchester-born Rhian admits she considered packing it in earlier this year but was a bit hasty.
She added: “I did say before that I wouldn’t do any more topless modelling.
"But then when you get offered the money to do things, it’s a bit like, ‘Just one more’.
“But now I’m married I can definitely say this is going to be my last topless calendar. It’s like a new chapter.
“Oliver wouldn’t mind me carrying on. But if I don’t stop now, I’m just going to continue putting it off.
“It’s the end of an era but it’s a happy ending, as I’ve finished on top and it’s been my choice.
“I don’t feel sad. I’ve done it for enough years.
"There are only so many pictures of my boobs that need to be shown and there are so many on the internet.”
And her famous assets almost ruined the wedding day when her dress had to be reinforced at the last minute to hold them in.
Rhian said: “I had so much trouble with my dress because my boobs are so big it was hard to find a dress to fit them."
"I tried on more than 60 dresses to find that one and it was strapless.
"I then needed 12 fittings to have it altered and two weeks before the wedding I was crying my eyes out thinking I was going to have to get another dress.
“It had to be reinforced with straps and added bone structure to support my boobs.
"They’ve got me through life so far but I’d have done anything to have smaller ones on the day.”
After launching her career at 19, Rhian’s 32E-25-34 curves quickly established her one of the most recognisable glamour models.
She was later caught up in two sexting scandals with TV presenter Vernon Kay behind the back of his wife, Strictly host Tess Daly, in 2010 and 2016.
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