Related for Sukkah 50:16

Best men and bridesmaids, and all [other] wedding attendees are exempt from [the] prayer [of Shmoneh Esreh] and from [putting on] Tefillin (Phylacteries), all seven days [of the wedding celebrations], but [they are] obligated in reading the Shema. Rebbi Shila says, “The groom is exempt [from saying the Shema, Shemoneh Esreh and putting on Tefillin], but the wedding attendees are obligated [in all of them].”