PIA’S MISSING RING RIDDLE

They’re usually gushy about each other on social media, but Pia Miller and Tyson Mullane have been oddly absent from each other’s Instagram accounts for months.

And now the former Home And Away actress has fuelled whispers their engagement is up in the air when she stepped out in Sydney last week without her diamond ring.

If there is trouble in paradise, 34-year-old Pia is doing her best to put on a brave face, posting happy snaps of beach time with her sons Isaiah, 15, and Lennox, 11.

“Pia seemed happy to be spending time with her boys, but Tyson was nowhere to be seen,” spilled an onlooker. “She wasn’t wearing her engagement ring, either.”

The couple only announced their engagement last November, after almost two years of dating.

There was no diamond last week and no Tyson... despite them looking loved-up in early January (below).