Formerly called the Third Order Secular or Dominican Tertiaries, Lay Dominicans are Catholic men and women who seek to live out their baptismal vows more faithfully through the Dominican spirituality and way of life. They undergo continuous formation and live by the four Pillars of Dominican life, namely: prayer, study, community, and apostolate. The Dominican Laity is the Lay Branch of the Order of Preachers. 
Almost a decade ago, Dr. Belén Lorezca-Tangco, OP envisioned a University of Santo Tomas-based lay Dominican fraternity that would provide formation for young Catholics who wish to join the Order as lay Dominicans. The goal is to introduce the vocation in their early years at the university and to cultivate it throughout their stay.  Today, the Young Thomasian Professionals (YTP) Lay Dominican Fraternity fulfills this objective by reaching out to students and young professionals, Thomasians and non-Thomasians alike.
The YTP is a chapter-in-formation begun in 2008 by Dr. Tangco OP, president of the Dominican Laity Provincial Council. It is based in Santisimo Rosario Parish, located inside the Pontifical and Royal University of Santo Tomas in Manila, and lies within the territory of the Dominican Province of the Philippines.
As of January 2017, the fraternity has a total of nineteen (19) active members undergoing continuous formation, four (4) of whom are professed.
The Special Patroness & Protectress of Lay Dominicans
 No.1, General Declaration I by Master of the Order Fr. C.A.Costa (2007)
 Former Artlets Dean wants young people to become lay Dominicans. The Varsitarian (September 17, 2010); Dominican Master General impressed by UST’s ‘intellectual diversity’. The Varsitarian (March 4, 2011).