The presenter stepped out with co-host Claudia Winkleman, 47, in a glamorous sequin adorned gown.
The skintight dress flaunted the mum-of-two’s slender frame and flashed a glimpse of her toned pins with a split which extended towards her thighs.
Tess wore her blonde locks straight for the occasion and opted for a smokey eye make-up look and a nude lip.
The Strictly host shared a snap of her gown in view of her 496,000 followers before the show.
Tess beamed with delight in both snaps, as she stood backstage in front of a sparkly background.
She captioned the post: “Finale time.. @bbcstrictly See you in 15 minutes!”
Fans took to the comments section to share their thoughts about Tess’ dress.
One person wrote: “You look absolutely gorgeous.”
Another added: “Well I can see who’s the REAL winner tonight.”
A third fan gushed: “Beautiful dress, beautiful lady”
“You’ve finally been embracing the sparkles this year! You look absolutely stunning,” a fourth person commented.