Reports said the couple had planned to announce their engagement this week, when Middleton turns 30.
A new report says the rumors are completely untrue.
Jackson and Middleton have been dating just six months. Different reports stated the couple had become engaged on vacation in the Caribbean in June but had avoided a public announcement in the interest of maintaining royal etiquette.
“They didn’t want an announcement before Pippa’s birthday because they didn’t want to take the shine off Kate and her baby,” a source allegedly told People.
"Pippa loved seeing Kate go down the aisle and now it is her turn for a fairytale wedding. She couldn’t be more sure that Nico is the right for her. They are such a good fit for each other and their families get on really well. Everyone is so happy for Pippa."
But sources at Us Weekly say that there is not yet another Middleton bride.
The party planner first made headlines while serving as maid of honor at her sister's wedding in April 2011, and buzz has surrounded her ever since.
"It's a bit startling to achieve global recognition before the age of 30 on account of your sister, your brother-in-law and your bottom," she said in her book, "Celebrate."