Gerald Koh

Gerald Koh (许国欢, born September 19, 1984), better known by his stage name Boy Thunder, is a Singaporean radio personality. He once worked as a radio host for Singapore-based music station Hot FM 91.3 and hosted the evening show Taking You Home with Adam Piperdy and Joshua Simon from 4 - 7.30pm. In June 2014, he joined rival station 987 and hosted the night show "Itchy Pyjamas" from 8pm to 12 midnight. Currently, he is hosting "Hotdogs", along with Adam Piperdy from 8pm-12am every weekday.

Koh attended Ngee Ann Polytechnic, where he studied Mass Communication.

In March 2013, Boy Thunder, alongside Adam Piperdy, presented the longest marathon show in Singapore radio history, which lasted for 77 hours and 11 minutes with no breaks in between. The duo also managed to achieve a Guinness World Record for the Longest Marathon for a Radio Music Show DJ – Team.

Koh is married to finance executive Thia Zhi Xin on 20 February 2016.