Madonna was one proud parent over the weekend as she celebrated her oldest son Rocco's birthday.MORE: Madonna's son dances in a dress in fun video at homeThe Vogue hitmaker took to Instagram to share a series of photos of herself with the birthday boy as they went out for a luxury dinner.Madonna was all smiles as she sat next to Rocco - who is his dad Guy Richie's double! In the caption, the mother-of-six wrote: "From one Leo to another!! Happy birthday Rocco."VIDEO: Madonna's teenage son David dances in a dress in must-see footageOther photos included one of Rocco cutting his flamboyant birthday cake as his younger twin sisters Stella and Esther watched on.MORE: Lourdes Leon is the image of Madonna in nude corset SEE: Madonna's daughter Lourdes Leon resembles a goddess in tiny green bikiniFans were quick to comment on the snapshots, with many remarking on just how grown up Rocco looked, while others were torn over just who Rocco looked most alike.