According the Daily Mail, the nickname came about amidst rumours of Meghan's behaviour and relationships with members of the royal family.
Reports have emerged labelling the fresh royal as controlling and domineering, with rumours circulating that a feud between the duchess and Kate Middleton began after Kate was reportedly left in tears over Princess Charlotte's bridesmaid dress earlier in May.
Now, royal staff have dubbed the soon-to-be-parents Monica and Chandler based on Meghan's controlling persona and Harry's relaxed and likeable, yet submissive, personality.
Meghan has also raised concerns over conducting her own royal affairs under the radar. She recently attended a Michelle Obama speech, met up with academics, and made an appearance at the British Fashion Awards.
The 37-year-old royal newcomer is well-known for regularly breaking royal protocol and in addition to conducting her own royal affairs, she's also convinced her husband to snub the annual royal Boxing Day hunting event due to her stance against blood sports and wearing fur.