Further fuelling the wedding rumours, Brooklyn uploaded a photo to his account of Nicola wearing a black lace slip.
While one fan commented “Mrs Beckham” many others suggested Nicola may be pregnant, if not already, then very soon.
Brooklyn, 21, and Nicola had been dating for around nine months before announcing their engagement just last month.
"Two weeks ago I asked my soulmate to marry me and she said yes. I am the luckiest man in the world. I promise to be the best husband and the best daddy one day. I love you baby," Brooklyn captioned his post.
Nicola shared a similar announcement at the time, which read: "You’ve made me the luckiest girl in the world. I can’t wait to spend the rest of my life by your side. Your love is the most precious gift. I love you so so much baby and thank you Harper for this pic."
Wearing a stunning yellow dress, from non other than Brooklyn's mother Victoria’s fashion line, Nicola showed off her dazzling ring.
According to a report by The Sun, Nicola's lavish emerald cut engagement ring is estimated to feature a 4.5-5 carat diamond and is worth a whopping £250,000 (AU$451,515).
Brooklyn’s parents were over the moon with the news, having welcomed Nicola into the family as their own already.
"The MOST exciting news!! We could not be happier that @brooklynbeckham and @nicolaannepeltz are getting married! Wishing you so much love and a lifetime of happiness 🙏🏻We all love you both so much,” Victoria shared.