Among the new faces were three PKR assemblymen, Haniza Mohamed Talha (Lembah Jaya), Shaharuddin Badaruddin (Seri Setia) and Hee Loy Sian (Kajang).
Others who were also sworn in as state exco members were Ng Sze Han (Kinrara-DAP), Siti Mariah Mahmud (Seri Serdang-Amanah), Izham Hashim (Pandan Indah-Amanah) and Abdul Rashid Asari (Selat Klang-PPBM).
Meanwhile, three excos who had served in the previous term also made it to the lineup.
They were Teng Chang Khim (Bandar Baru Klang-DAP), V Ganabatirau (Kota Kemuning-DAP) and Amirudin Shari (Sungai Tua-PKR).
The swearing-in ceremony was also witnessed by Shah Alam High Court Judge Mohd Zabidin Mohd Diah at the Balairung Seri in the palace at 3pm.
Also present were Tengku Permaisuri Selangor Tengku Permaisuri Norashikin, Raja Muda of Selangor Tengku Amir Shah, Menteri Besar Mohamed Azmin Ali and state secretary Mohd Amin Ahmad Ahya.
Pakatan Harapan (PH) returned to power in Selangor by winning 51 of the 56 state assembly seats in the 14th general election (BN) last week.
Barisan Nasional (BN) lost eight of its 12 seats while PAS retained only one of the 12 seats it had held.