Felicity Huffman was so keen to accurately portray a pre-operative transsexual in new movie TRANSAMERICA she insisted on wearing a prosthetic penis and naming it Andy.

The DESPERATE HOUSEWIVES star, who is married to actor William H Macy, plays STANLEY 'BREE' OSBOURNE - a man determined to surgically become a woman before suddenly discovering he has fathered a son.

And while movement and voice coaching helped authenticate her performance, Huffman was convinced it wouldn't work without installing a vital organ replica.

She tell the New York Daily News, "But I still realized something was missing. They're incredibly lifelike, and for some reason we named him Andy.

"And he stayed with me for the entire shoot."