Robert Downey Jr sports $2k Givenchy wedged sneakers at his 50th bash

And for his star-studded 50th birthday bash on Saturday, Robert Downey Jr showed off his nearly $2,000 Givenchy sneakers that featured a two-and-a-half inch heel.

The Iron Man star - who owns an impressive range of high-fashion shoes - celebrated his latest birthday with some of his famous friends including Avengers co-star Jeremy Renner, Jennifer Aniston, Justin Theroux, Gwyneth Paltrow and her rumoured beau Brad Falchuk at Barker Hangar near the Santa Monica Airport.

For his big night, the man of the hour wore a black and white printed T-shirt under a color coordinated blazer and matching trousers.

The Oscar nominee - who is the two-time reigning Forbes' highest paid actor - accessorized his monochrome outfit with a pair of white rimmed glasses to continue the black and white theme.

But perhaps the most expensive element of his birthday getup were his Givenchy Tyson wedged sneakers which retail at Barney's New York stores for $1,945.

Made in Italy, the checkerboard woven leather shoes are designed with a classic high-top's round toe, padded tongue and collar, thick outsole with Velcro ankle strap.

Although his 50th party was the first time RDJ was pictured with his chequered designer shoes, the father-of-three owns a similar pair of sneakers by Givenchy designer Ricardo Tisci.

In October 2014, Robert was seen wearing the Nappa leather Tyson sneakers from the brand's Fall/Winter collection.

He and wife Susan, who was pregnant with son Exton at the time, attended The Judge premiere at the AMPAS Samuel Goldwyn Theater in Beverly Hills.

The real-life Tony Stark ditched his dress shoes for sneakers as he paired his suit and tie with a more casual footing.

At previous red carpet events, Robert has showcased his numerous collection of designer footgear.

His closet contains some of the swankiest shoes including the Christian Louboutin Louis Strass sneakers ($2,495), Marc Jacobs Beaded Sneakers ($932), Lanvin High-top sneakers (835), Gucci Trek Brown Leather Boots ($685) and Gucci Technical Fabric sneaker ($550).

And according to Forbes, Robert has more than enough of the financial means to afford all his designer pairs.

'His earnings from June 2013 to June 2014 totaled approximately $75 million' just by the Iron Man franchise alone and 'was paid on the back end from Iron Man 3's $1.2 billion revenue.'

Perhaps Robert will once again flaunt a costly pair of sneakers when he attends the 2015 MTV Movie Awards at the Nokia Theatre in LA on April 12.

He is scheduled to accept the MTV Generation Award at the Amy Schumer-hosted ceremony.

Robert will be presented with the honor by his Avengers cast mates Chris Evans, Scarlett Johansson, Chris Hemsworth, Mark Ruffalo and Jeremy Renner.

A special first look of the Marvel superhero flick - which premieres May 1 - will also air at the annual MTV soiree.