The details on their roles are being kept under wraps, but since the finale will feature Amy and Sheldon's much-awaited wedding, the two actors may star as the family members, EW reported.
Sheldon's family has been introduced in "TBBT" with his mother Mary and sister Missy often making appearances and with the spin-off "Young Sheldon" the viewers also got an insight into the ace astrophysicist's childhood.
The finale installment may throw some light on Amy's family - her mother's (Mrs Fowler) character, briefly appeared via video chat in season nine and her father is has not yet appeared on the show.
The season finale of "TBBT" will air on May 10.
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