Credit: SWNS / Treyvaughn Isley Carroll

A mum surprised her spiderman-obsessed son on his birthday by dressing up as the superhero for an entire day.

Tara Nicolina Carroll, 26, put on a Spidey outfit after her boy said he wanted to meet Spiderman and go to Target and Barnes and Noble.

The stay-at-home mum managed to pull the surprise without Titus, four, realising that his mum was behind the Marvel costume all along.

A video shows Tara in her Spiderman costume taking Titus his favourite stores and buying him presents.