After she announced her cancer diagnosis on Twitter Thursday, Julia Louis-Dreyfus has received an outpouring of support from costars and fans. Former 'Seinfield' costars Jason Alexander and Michael Richards were quick to share kind messages. Alexander tweeted, ?@OfficialJLD so sorry you have to go thru this, pal, but I know you will prevail. We are here if/when you need and we love you." Michael Richards told People Magazine, ?I wish Julia godspeed and a full recovery.? Former Vice President Joe Biden also shared supportive words, writing on Instagram, ?We Veeps stick together. Jill and I, and all of the Bidens, are with you Julia.?