What will happen when Nina Garcia and Christian Siriano cross paths with the "Betty" players?

"Ugly Betty" will get a "Project Runway" fashion infusion this May when the Bravo show judge NINA GARCIA and competition winner CHRISTIAN SIRIANO pay a visit to Mode!

The Elle magazine fashion director and the fourth season champ will film their scenes next month, with the special "Betty" episode scheduled to air during May sweeps.

No word yet on what will go down during the episode, but the show press release asks, "How fierce will it be when Christian and Nina meet Betty (AMERICA FERRERA), Daniel (ERIC MABIUS) and the other Modies? And what will fashion wunderkid Christian do when he crosses paths with Mode's own hot tranny mess, Alexis Meade (REBECCA ROMIJN)? Stay tuned."

Of course, Nina and Christian are not the first "Runway" specialists to guest star on the hit ABC show. "Runway" mentor TIM GUNN and guest judges VICTORIA BECKHAM, VERA WANG and KENNETH COLE have made a splash on "Betty" in the past.