Australian businessman Mark, who will receive a £250,000 investment from Lord Alan Sugar, was joined at the studios by runner-up Bianca Miller.
Mark couldn't stop smiling as he made his way into the building, before being stopped by fans desperate to get a photo with him.
Bianca also couldn't take the smile off her face after reaching the final two in what has been an extremely competitive series.
On Sunday's final, Lord Sugar picked Mark as his new business partner after deciding to invest in his digital marketing agency.
Despite losing out to Mark, Bianca is still going ahead with her business plan - which is to launch a range of tights to match to various different skin tones - and she's already asked the public via Twitter to register their interest in her new product.
During last night's finale, 25-year-old Bianca launched her business with a luxury price tag of £35 and later whittled it down to £20. But as confirmed while speaking to Dara O Briain last night, Bianca's tights will now retail at £7.99.
A new series of The Apprentice will return next year, but Lord Sugar's adviser, Nick Hewer, won't return, as he decided to retire from the boardroom after 10 years.
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