The pair dated on and off for ten years and became engaged back in March. However, they broke up five months later and Goodger later insisted that the couple would never reconcile again.
Sources claim that Wright and Goodger "couldn't keep their hands off each other" after meeting up at Faces nightclub in Essex this week.
According to the Daily Star, the former lovers "passionately snogged" at the venue until 2am, before leaving together and spending the night at Wright's house.
"They spent a lot of time snogging in the club," an insider said. "Mark kept grabbing Lauren's bum and shouting over the music to her that he had never seen her look so beautiful. None of his family seemed surprised that they were back together."
Goodger herself is quoted by the publication as admitting to "staying over at Mark's for the last week", though a spokesperson for the reality star has insisted that she was joking.
"Lauren is absolutely not back with Mark nor has she been living at his for the past week," her rep said. "She has been moving into her own place all week."
Wright shed tears over his break-up with Goodger during his appearance on I'm a Celebrity... Get Me Out of Here last month, revealing that he is still in love with the model.