How to use "speak of the devil"

What Does "speak of the devil" Mean?

The idiom "speak of the devil" is used when a person appears unexpectedly just as they are being talked about. It is the shortened version of the older proverb, "Speak of the devil and he shall appear."

• Idiomatic meaning: It refers to the coincidence of someone arriving or making their presence known at the exact moment they are the subject of conversation.
• Origin: The phrase dates back to at least the 16th century. In its original form, it served as a superstitious warning that talking about evil spirits or the devil would summon them. Over time, the phrase lost its sinister religious connotation and became a lighthearted way to acknowledge a coincidental arrival.
• Register: This expression is informal to neutral. It is perfectly acceptable in casual conversation and journalism, though it is rarely used in formal academic or legal writing.

How to Use It

• Grammatical flexibility: The phrase is most commonly used as a standalone exclamation. While it can be integrated into a sentence (e.g., "And speak of the devil, here she is!"), it is rarely negated or turned into a question. You would not typically say, "Did you speak of the devil?"
• What sounds unnatural: Using the full historical version ("and he shall appear") in modern conversation sounds archaic. Additionally, using it when the person has been present for a long time—rather than just arriving—negates the "coincidence" required for the idiom to work.

Real-World Examples

These examples are sourced from speak of the devil on Ludwig.guru.

"Speak of the devil — he marches through the door, and becomes apoplectic when he learns of the upheaval." — newyorker.com

"3.09pm: Speak of the devil: Aaron Porter has just been interviewed on BBC News, he said that the violence at Millbank Tower was "absolutely not" the plan." — theguardian.com

""If the character is smug, bitchy, trashy or has dubious morals, call me!" And – speak of the devil – in the West End transfer of Richard Bean's phone-hacking play Great Britain, she takes over from Billie Piper as a power-crazed tabloid editor." — theguardian.com

"Update: Speak of the devil." — techcrunch.com

"If appropriate, drop a line "speak of the devil, I'm with him right now." — wikihow.com

Similar Phrases and Alternatives

Phrase	Context
look who it is	Informal; used to acknowledge someone's arrival with surprise or enthusiasm.
talk of the angels	A rare, more positive alternative used when the person arriving is well-liked.
right on cue	Neutral; implies someone arrived at the perfect moment for the conversation.
timely arrival	Formal; describes an arrival that happens at a useful or significant moment.
speak of the person	A literal, non-idiomatic way to describe the event in a report.

Common Mistakes

• Literal Misinterpretation: Some learners believe the phrase implies the person being discussed is actually "evil" or disliked. In modern English, it is a neutral observation of timing and is frequently used for friends and colleagues.
• Negative Connotation: Learners often use the phrase with a negative connotation, not realizing it is generally used as a neutral or lighthearted observation of timing. It does not insult the person appearing.
• Over-modification: Trying to change the noun (e.g., "speak of the ghost") usually fails to convey the idiomatic meaning and just confuses the listener.

Quick-Reference Summary

Expression	Idiomatic Meaning	Register	Avoid In
speak of the devil	Said when someone appears just as they are being mentioned.	Informal/Neutral	Formal academic papers or legal documents.

FAQs

Is "speak of the devil" ever used literally or is it always figurative?

While almost always used as a figurative idiom today, the phrase can be used literally in historical, religious, or fictional contexts involving the actual devil. However, in 99% of daily conversations, it simply refers to the coincidental arrival of a person.

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What is the difference between "speak of the devil" and "right on cue"?

While both refer to timing, speak of the devil specifically requires that the person was being talked about immediately before appearing. Right on cue is broader and can refer to any action or event that happens at the expected or perfect moment.

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Does using this phrase mean I think the person is bad?

No, this is a common misconception where learners use the phrase with a negative connotation. In modern English, it is a neutral or lighthearted way to remark on a coincidence and does not suggest the person has a wicked character.