Fun House, the 2014 Broodmare of the Year, has produced another runner by Tapit   in Untapped, who will make her first start Sept. 16 in a one-mile maiden special weight for 2-year-old fillies at Churchill Downs.

Untapped is a full sister to 2014 champion 3-year-old filly Untapable, now retired, and the 3-year-old colt Taprize, who debuted April 23 but has not hit the board in three starts. Fun House also produced grade I winner Paddy O' Prado (El Prado).

All three siblings by Tapit are Winchell Thoroughbreds homebreds trained by Steve Asmussen.

Untapped posted a Churchill bullet Sept. 2, working five furlongs in 1:00 3/5 to rank fastest of 17 that day. The juvenile filly is the 4-1 favorite on the morning line.

Two other juvenile half sisters to grade I winners will debut Friday as well at Arlington International Racecourse going about five furlongs on the turf.

Chapeau Chic, by Hat Trick  , is out of the Joyeux Danseur mare Chic Dancer, who also produced 2015 Queen Elizabeth II Challenge Cup Stakes (gr. IT) winner Her Emmynency.

The S.D. Brillie Partnership homebred has been training on the all weather-track at the Chicagoland oval for trainer Michele Boyce.

Scott Pierce's Gorgeous in Gold, trained by Michael Stidham, is a Malibu Moon   filly out of the Seeking the Gold mare Glasgow's Gold, who also produced grade I winner Swift Temper (Giant's Causeway). Glasglow's Gold has produced six winners from seven runners, including stakes winner Croisiere (Capote).

Stidham's other entry, Princess Lu Lu, is the 4-1 morning-line choice in the race.