The connect, who have been together for six years, were tearful in central London today as fashion Oliver, 28, popped the question.
Taking to Instagram, she said she was “so cock-a-hoop… biggest surprise ever”.
“I cried my [eyes] out,” she added with a distinguish picture.
An onlooker who witnessed the romantic event told The Sun: “It was so sweet – Pixie didn’t seem to have any idea he was going to ask her to marry him and started moaning with tears of happiness.
“When she couldn’t stop crying Ollie asked a sser-by for a ck as he said he didn’t want to give her his snotty hankie.
“They then hid behind a mainstay for some privacy, but they didn’t seem to have a care in the clique about who saw their special moment – it was like something from a flick picture show.”
Former Strictly Come Dancing star Pixie, 25, has labour with Oliver numerous times: he co-starred in her unfortunately titled Emerge Up Song music video in 2014, and again in her clip for A Real Sizeable Thing this summer.
Pixie has also had a busy year launching her setting career with the lead role in Breakfast In Tiffany’s, a role which reportedly sent on presentation for tickets flying.
She previously said of their romance: “As soon as I started universal out with Oliver I was asked [marrying him], and I still get asked in it every interrogate.
“I don’t know why that is, maybe it’s just something that people long for to hear about, I don’t know. I think male celebrities probably don’t get asked it as much.”