Exhibit 8.1
MARTIN LIPTON HERBERT M. WACHTELL THEODORE N. MIRVIS EDWARD D. HERLIHY DANIEL A. NEFF ANDREW R. BROWNSTEIN MARC WOLINSKY STEVEN A. ROSENBLUM JOHN F. SAVARESE SCOTT K. CHARLES JODI J. SCHWARTZ ADAM O. EMMERICH RALPH M. LEVENE RICHARD G. MASON DAVID M. SILK ROBIN PANOVKA DAVID A. KATZ ILENE KNABLE GOTTS JEFFREY M. WINTNER TREVOR S. NORWITZ BEN M. GERMANA ANDREW J. NUSSBAUM RACHELLE SILVERBERG	STEVEN A. COHEN DEBORAH L. PAUL DAVID C. KARP RICHARD K. KIM JOSHUA R. CAMMAKER MARK GORDON JOSEPH D. LARSON JEANNEMARIE O’BRIEN WAYNE M. CARLIN STEPHEN R. DiPRIMA NICHOLAS G. DEMMO IGOR KIRMAN JONATHAN M. MOSES T. EIKO STANGE JOHN F. LYNCH WILLIAM SAVITT ERIC M. ROSOF GREGORY E. OSTLING DAVID B. ANDERS ANDREA K. WAHLQUIST ADAM J. SHAPIRO NELSON O. FITTS JOSHUA M. HOLMES	51 WEST 52ND STREET NEW YORK, N.Y. 10019-6150 TELEPHONE: (212) 403 -1000 FACSIMILE: (212) 403 -2000 _______________		DAVID E. SHAPIRO DAMIAN G. DIDDEN IAN BOCZKO MATTHEW M. GUEST DAVID E. KAHAN DAVID K. LAM BENJAMIN M. ROTH JOSHUA A. FELTMAN ELAINE P. GOLIN EMIL A. KLEINHAUS KARESSA L. CAIN RONALD C. CHEN GORDON S. MOODIE DONGJU SONG BRADLEY R. WILSON GRAHAM W. MELI GREGORY E. PESSIN CARRIE M. REILLY MARK F. VEBLEN VICTOR GOLDFELD EDWARD J. LEE BRANDON C. PRICE KEVIN S. SCHWARTZ	MICHAEL S. BENN SABASTIAN V. NILES ALISON ZIESKE PREISS TIJANA J. DVORNIC JENNA E. LEVINE RYAN A. McLEOD ANITHA REDDY JOHN L. ROBINSON JOHN R. SOBOLEWSKI STEVEN WINTER EMILY D. JOHNSON JACOB A. KLING RAAJ S. NARAYAN VIKTOR SAPEZHNIKOV MICHAEL J. SCHOBEL ELINA TETELBAUM ERICA E. BONNETT LAUREN M. KOFKE ZACHARY S. PODOLSKY RACHEL B. REISBERG MARK A. STAGLIANO
		GEORGE A. KATZ (1965-1989) JAMES H. FOGELSON (1967-1991) LEONARD M. ROSEN (1965-2014) _______________ OF COUNSEL
		MARTIN J.E. ARMS MICHAEL H. BYOWITZ KENNETH B. FORREST SELWYN B. GOLDBERG PETER C. HEIN MEYER G. KOPLOW LAWRENCE S. MAKOW DOUGLAS K. MAYER PHILIP MINDLIN DAVID S. NEILL HAROLD S. NOVIKOFF LAWRENCE B. PEDOWITZ	ERIC S. ROBINSON PATRICIA A. ROBINSON* ERIC M. ROTH PAUL K. ROWE DAVID A. SCHWARTZ MICHAEL J. SEGAL ELLIOTT V. STEIN WARREN R. STERN PAUL VIZCARRONDO, JR. PATRICIA A. VLAHAKIS AMY R. WOLF
		* ADMITTED IN THE DISTRICT OF COLUMBIA _______________ COUNSEL
		DAVID M. ADLERSTEIN SUMITA AHUJA AMANDA K. ALLEXON LOUIS J. BARASH OLIVER J. BOARD FRANCO CASTELLI ANDREW J.H. CHEUNG PAMELA EHRENKRANZ KATHRYN GETTLES-ATWA	ADAM M. GOGOLAK NANCY B. GREENBAUM MARK A. KOENIG J. AUSTIN LYONS ALICIA C. McCARTHY PAULA N. RAMOS NEIL M. SNYDER S. CHRISTOPHER SZCZERBAN JEFFREY A. WATIKER

April 24, 2020

FB Financial Corporation

211 Commerce Street, Suite 300Nashville, Tennessee 37201

Ladies and Gentlemen:

Reference is made to the Registration Statement on Form S-4 (as amended or supplemented through the date hereof, the “Registration Statement”) of FB Financial Corporation, a Tennessee corporation (“FB Financial”), including the joint proxy statement/prospectus forming a part thereof, relating to the proposed transaction by and among Franklin Financial Networks, Inc., a Tennessee corporation, FB Financial and Paisley Acquisition Corporation, a Tennessee corporation.

We have participated in the preparation of the discussion set forth in the section entitled “MATERIAL U.S. FEDERAL INCOME TAX CONSEQUENCES OF THE MERGER” in the Registration Statement. In our opinion, such discussion of those consequences, insofar as it summarizes United States federal income tax law, and subject to the qualifications, exceptions, assumptions and limitations described therein, is accurate in all material respects.

We hereby consent to the filing of this opinion with the Securities and Exchange Commission as an exhibit to the Registration Statement, and to the references therein to us. In giving such consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act of 1933, as amended.

Very truly yours,