to post a picture of them - along with her bump - to announce the exciting news.
She captioned the image: "When two hearts become three... just can't wait for the next chapter with my fiancee."
The happy couple got engaged in secret during this summer's World Cup, with Megan posting a picture of herself wearing a ring on Instagram back in June.
The 22-year-old was in Russia throughout the tournament as Pickford and co delivered the Three Lions' best finish at a World Cup since 1990.
Megan and Jordan met in their home town of Sunderland and have been together for over seven years.
The couple moved to Merseyside following Pickford's £30m transfer from Sunderland to Everton last summer.
It caps off a brilliant week for the highly-rated goalkeeper, with the Toffees confirming on Wednesday Pickford had signed a new six-year deal.
Speaking about his new deal, Pickford hailed the impact being at Goodison Park has had on his career.
Everton 3-0 Fulham: Gylfi Sigurdsson scored twice as Toffees see-off toothless CottagersHe said: "It’s been a whirlwind of a year and a big leap for me.
"I think it’s a great step for the club and a great direction to be heading.
"If I wasn’t here, then I might not have been with England at the World Cup.
"I think getting this move has improved me massively.’