'Mark and I have had such an amazing time together and we will forever cherish our special moments, unfortunately, at this point in time we have decided we are both going in different directions and have to part ways,' she continued to say.
'Thank you, everyone, for your support and we hope right now you can respect our privacy.'
She shared a relatable quote that read: 'Don't cry because it is over, smile because it happened'.
Mark, 27, shared a similar post with a photo of himself and his dog.
'Millie and I have had such an amazing time together and we will forever cherish our special moments,' he wrote.
'Unfortunately, at this point in time we have decided we are both going in different directions and have to part ways, we still remain very close friends.’
'I've decided I'm gonna take some off social media and focus on what's truely [sic] important my career, friends and family. Thank you everyone for your support. P.s Bye bee - I'm gonna miss you Mark x.'
Both, Millie and Mark's Instagram followers were shocked by the posts and raised doubts over the authenticity of the combined announcements in the comments section.
'Is this April fools?' one skeptical fan asked.
'Another April fools,' another wrote.
The last time either one of them posted a photo of the two of them together was over a month ago.
I guess that just speaks for itself.
But they do both still follow each other on Instagram - friendly exes perhaps?