The model has moved into the star’s £2.25million luxury Hertfordshire pad as their love blossoms.
Ruby, 21, who has a flat near Man Utd’s Old Trafford stadium, spent Christmas with Dele, 20.
A source said their romance has “really gone to the next level”.
It comes days after the loved-up couple were spotted hitting swanky champagne bar Searcys in central London on Sunday.
Alli, dressed in denim, held his girlfriend’s hand as pals chatted to them.
White hot model Ruby was in the stands to watch Alli’s Spurs beat title rivals Chelsea last week.
His dad Kenny said the midfield maestro is a prince in Nigeria through birth.
The Spurs ace recently joked about signing up for Aston Villa.
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