This talk will review our recent studies in fabricating and characterizing high-entropy ceramics. As examples, I will discuss several classes of high-entropy ceramics that first fabricated in our group at UCSD, including: high-entropy metal diborides as the first example of a new class of ultrahigh temperature ceramics [Scientific Reports 6:37946 (2016)], high-entropy perovskite oxides with two cationic sublattices [Scripta Mater. 142:116 (2018)], high-entropy fluorite-structured oxides with substantial oxygen vacancies [J. European Ceram. Soc. 38:3578 (2018)], and a high-entropy metal disilicide with a lower symmetry [Journal of Materiomics, https://doi.org/10.1016/j.jmat.2019.03.002 (2019)], as well as single-phase high-entropy intermetallic compounds (e.g., aluminides) that bridge high-entropy metals and ceramics [Science Bulletin 64:856 (2019)]. Furthermore, novel fabrication methods [e.g., reactive flash spark plasma sintering, Scripta Mater. 170:106 (2019)], microstructural controls, unique properties, and potential applications will also be discussed.