FORM 6-K

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16
of the Securities Exchange Act of 1934

For the month of: May 2008 Commission File Number: 001-133354

BANK OF MONTREAL

(Name of Registrant)

100 King Street West
1 First Canadian Place
Toronto, Ontario
Canada, M5X 1A1
(Executive Offices) 129 rue Saint-Jacques
Montreal, Quebec
Canada, H2Y 1L6
(Head Office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F o          Form 40-F þ

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the SEC pursuant to Rule 12g3-2(b) under the Securities Exchange act of 1934:

Yes o          No þ

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): N/A

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	BANK OF MONTREAL
	By:	/s/ Russel C. Robertson
		Name:	Russel C. Robertson
		Title:	Interim Chief Financial Officer
	By:	/s/ Blair F. Morrison
		Name:	Blair F. Morrison
Date: May 27, 2008		Title:	Vice-President and Corporate Secretary

EXHIBIT INDEX

Exhibit	Description of Exhibit
99.1	Press Release — BMO Financial Group Reports Second Quarter Results with Good Earnings Momentum.