This article evaluates a potential angelomorphic tradition in Acts 12.15c. It demonstrates that the most common interpretation of the phrase ὁ ἄγγελός ἐστιν αὐτοῦ (‘it is his angel’, 12.15c) as referring to Peter’s guardian angel fails to account adequately for the evidence. After surveying several different proposals for interpreting the phrase, it argues that angelomorphy/angelisation is the most plausible option available to Luke and his earliest readers. Finally, this article demonstrates how an angelomorphic interpretation of Acts 12.15c is congruent with both the broader concern for angelomorphy/angelisation throughout Luke-Acts, as well as the use of humour and irony in Acts 12.12–15.1